[PWGLF,PWGMM] Fix flattenicity: FT0 amplitude bug, multiplicity classes, code cleanup

[PaolaVT]

No description provided.

[github-actions]

O2 linter results: ❌ 0 errors, ⚠️ 0 warnings, 🔕 0 disabled

[alibuild]

Error while checking build/O2Physics/code-check for 9a5a550 at 2026-08-17 05:31:

## sw/BUILD/O2Physics-code-check-latest/log
--
========== List of issues found ==========
++ echo 'Found 3 errors and 0 warnings.'
Found 3 errors and 0 warnings.
++ [[ 3 -gt 0 ]]
++ cat /sw/BUILD/7d752c18afcc5bca10d747b42357dd050e2377e2/O2Physics-code-check/errors.txt
PWGMM/UE/Tasks/flattenicityTask.cxx:17:1: error: included header Multiplicity.h is not used directly [misc-include-cleaner,-warnings-as-errors]
PWGMM/UE/Tasks/flattenicityTask.cxx:421:15: error: no header providing "std::size_t" is directly included [misc-include-cleaner,-warnings-as-errors]
PWGMM/UE/Tasks/flattenicityTask.cxx:422:7: error: no header providing "uint8_t" is directly included [misc-include-cleaner,-warnings-as-errors]
++ [[ 0 -gt 0 ]]
++ [[ 3 -gt 0 ]]
++ exit 1
--

Full log here.

[alibuild]

Error while checking build/O2Physics/o2 for 9a5a550 at 2026-08-18 12:27:

## sw/BUILD/O2-latest/log
2026-08-18T02:37:24.875+0200 [55697:140207241906752] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "ActionCache.GetActionResult()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:37:24.875+0200 [55697:140207241906752] [executioncontext.cpp:544] [ERROR] Error while querying action cache at "http://localhost:8980": 14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame
2026-08-18T02:37:44.876+0200 [55697:140207241906752] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "FindMissingBlobs()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:37:25.302+0200 [55742:140260458486336] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "ActionCache.GetActionResult()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:37:25.302+0200 [55742:140260458486336] [executioncontext.cpp:544] [ERROR] Error while querying action cache at "http://localhost:8980": 14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame
2026-08-18T02:37:45.303+0200 [55742:140260458486336] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "FindMissingBlobs()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:37:25.358+0200 [55698:139979541940800] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "ActionCache.GetActionResult()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:37:25.358+0200 [55698:139979541940800] [executioncontext.cpp:544] [ERROR] Error while querying action cache at "http://localhost:8980": 14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame
2026-08-18T02:37:45.360+0200 [55698:139979541940800] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "FindMissingBlobs()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:37:25.578+0200 [55788:140040017578560] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "ActionCache.GetActionResult()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:37:25.578+0200 [55788:140040017578560] [executioncontext.cpp:544] [ERROR] Error while querying action cache at "http://localhost:8980": 14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame
2026-08-18T02:37:45.579+0200 [55788:140040017578560] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "FindMissingBlobs()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:37:25.799+0200 [55784:139695232780864] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "ActionCache.GetActionResult()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:37:25.799+0200 [55784:139695232780864] [executioncontext.cpp:544] [ERROR] Error while querying action cache at "http://localhost:8980": 14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame
2026-08-18T02:37:45.801+0200 [55784:139695232780864] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "FindMissingBlobs()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:37:26.430+0200 [55841:139702652697152] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "ActionCache.GetActionResult()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:37:26.430+0200 [55841:139702652697152] [executioncontext.cpp:544] [ERROR] Error while querying action cache at "http://localhost:8980": 14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame
2026-08-18T02:37:46.431+0200 [55841:139702652697152] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "FindMissingBlobs()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:37:28.359+0200 [55871:140445306210880] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "ActionCache.GetActionResult()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:37:28.359+0200 [55871:140445306210880] [executioncontext.cpp:544] [ERROR] Error while querying action cache at "http://localhost:8980": 14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame
2026-08-18T02:37:48.360+0200 [55871:140445306210880] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "FindMissingBlobs()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:37:31.250+0200 [55899:140149239822912] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "ActionCache.GetActionResult()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:37:31.251+0200 [55899:140149239822912] [executioncontext.cpp:544] [ERROR] Error while querying action cache at "http://localhost:8980": 14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame
2026-08-18T02:37:51.252+0200 [55899:140149239822912] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "FindMissingBlobs()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:37:33.127+0200 [55924:140338399177280] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "ActionCache.GetActionResult()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:37:33.128+0200 [55924:140338399177280] [executioncontext.cpp:544] [ERROR] Error while querying action cache at "http://localhost:8980": 14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame
2026-08-18T02:37:53.129+0200 [55924:140338399177280] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "FindMissingBlobs()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:38:06.165+0200 [55976:140427061324352] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "ActionCache.GetActionResult()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:38:06.165+0200 [55976:140427061324352] [executioncontext.cpp:544] [ERROR] Error while querying action cache at "http://localhost:8980": 14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame
2026-08-18T02:38:26.166+0200 [55976:140427061324352] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "FindMissingBlobs()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:38:06.320+0200 [55997:139958927673920] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "ActionCache.GetActionResult()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:38:06.320+0200 [55997:139958927673920] [executioncontext.cpp:544] [ERROR] Error while querying action cache at "http://localhost:8980": 14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame
2026-08-18T02:38:26.322+0200 [55997:139958927673920] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "FindMissingBlobs()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:38:06.389+0200 [56017:140176838834752] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "ActionCache.GetActionResult()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:38:06.390+0200 [56017:140176838834752] [executioncontext.cpp:544] [ERROR] Error while querying action cache at "http://localhost:8980": 14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame
2026-08-18T02:38:26.391+0200 [56017:140176838834752] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "FindMissingBlobs()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:38:06.593+0200 [56039:140566099708480] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "ActionCache.GetActionResult()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:38:06.594+0200 [56039:140566099708480] [executioncontext.cpp:544] [ERROR] Error while querying action cache at "http://localhost:8980": 14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame
2026-08-18T02:38:26.595+0200 [56039:140566099708480] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "FindMissingBlobs()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:38:07.767+0200 [56078:140424394091072] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "ActionCache.GetActionResult()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:38:07.767+0200 [56078:140424394091072] [executioncontext.cpp:544] [ERROR] Error while querying action cache at "http://localhost:8980": 14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame
2026-08-18T02:38:27.768+0200 [56078:140424394091072] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "FindMissingBlobs()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:38:08.477+0200 [56105:140165971876416] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "ActionCache.GetActionResult()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:38:08.478+0200 [56105:140165971876416] [executioncontext.cpp:544] [ERROR] Error while querying action cache at "http://localhost:8980": 14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame
2026-08-18T02:38:28.479+0200 [56105:140165971876416] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "FindMissingBlobs()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:38:13.103+0200 [56158:140009712314944] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "ActionCache.GetActionResult()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
2026-08-18T02:38:13.104+0200 [56158:140009712314944] [executioncontext.cpp:544] [ERROR] Error while querying action cache at "http://localhost:8980": 14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame
2026-08-18T02:38:33.105+0200 [56158:140009712314944] [buildboxcommon_grpcretrier.cpp:177] [ERROR] Retry limit (0) exceeded for "FindMissingBlobs()", last gRPC error was [14: failed to connect to all addresses; last error: UNKNOWN: ipv4:127.0.0.1:8980: connection attempt timed out before receiving SETTINGS frame]
[0 more errors; see full log]

Full log here.