Silence benign grpc.aio noise

[acroca]

The async DaprClient can emit noisy ERROR logs from grpc.aio's poller under load (BlockingIOError: [Errno 11] in PollerCompletionQueue._handle_events, upstream grpc/grpc#42357). The error is harmless, the poller retries the read and nothing is lost, and the workflow extension already suppresses it via a targeted asyncio-logger filter, but only when an async workflow client is created (#1053/#1102).

This PR moves that filter to a shared home in dapr/common/logging.py and installs it from DaprGrpcClientAsync as well, so core async client users get the suppression too. The previously duplicated copy in _durabletask/aio/internal/shared.py now imports the shared helper. The filter drops only records whose exception is a BlockingIOError and whose message references the poller callback; everything else on the asyncio logger passes through.

• Filter definition moved to dapr/common/logging.py; behavior tests moved to tests/common/test_logging.py
• DaprGrpcClientAsync.__init__ installs the filter (idempotent) before channel creation
• Workflow ext unchanged in behavior; its AGENTS.md note updated

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.13%. Comparing base (bffb749) to head (c21cfbc).
⚠️ Report is 175 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1127      +/-   ##
==========================================
- Coverage   86.63%   82.13%   -4.50%     
==========================================
  Files          84      117      +33     
  Lines        4473     9612    +5139     
==========================================
+ Hits         3875     7895    +4020     
- Misses        598     1717    +1119     

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[Copilot]

Pull request overview

This PR centralizes suppression of a known-benign grpc.aio poller BlockingIOError: [Errno 11] log line by moving the targeted asyncio-logger filter into a shared dapr.common.logging helper and installing it in the core async gRPC client, while keeping workflow behavior unchanged via reuse of the shared helper.

Changes:

• Add GrpcAioPollerNoiseFilter + silence_grpc_aio_poller_noise() in dapr/common/logging.py and install it from DaprGrpcClientAsync.__init__.
• Replace the workflow extension’s duplicated filter implementation with an import of the shared helper.
• Move/adjust tests so filter behavior + idempotency live in tests/common/test_logging.py, and add a core async-client installation test.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tests/ext/workflow/durabletask/test_grpc_aio_log_filter.py	Updates workflow durabletask test to assert the shared filter is installed (behavior tests moved elsewhere).
tests/common/test_logging.py	New unit tests for filter behavior and idempotent installation in the shared helper.
tests/common/init.py	Adds package marker for the new tests/common test module.
tests/clients/test_dapr_grpc_client_async.py	Adds a test verifying the core async gRPC client installs the filter once.
dapr/ext/workflow/AGENTS.md	Updates workflow agent guidance to reference the shared helper and core async client behavior.
dapr/ext/workflow/_durabletask/aio/internal/shared.py	Removes duplicated filter code and calls the shared silence_grpc_aio_poller_noise().
dapr/common/logging.py	Introduces the shared filter and idempotent installer on the asyncio logger.
dapr/aio/clients/grpc/client.py	Installs the shared filter during async client initialization prior to channel creation.

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