fix(clickhouse): drop obsolete task event index variants

[anurag6569201]

Summary

Removes the obsolete task event full-text indexes in one ALTER TABLE, accounting for both known index naming variants.

Fix

The original migration issued back-to-back alters while ClickHouse could still be processing the preceding index mutation. Combining the index removals avoids scheduling a subsequent alter against an unfinished mutation.

The native JSON storage change is deferred until it can be performed without rewriting populated parts.

Source merge-base: 8d78ec5144dbdac9fc76ea89c2cef4a1b04efe57
Source head: 8d31ef4dfd27885a4b89c37a6c104b035ef9f5b8

[shipwright-agent]

⛔ Shipwright · Blocked

Recommendation: do not merge PR #9 · Tier T3
Checks: 0 total · 0 needing attention

Next step: resolve the blocking findings before merge.

Findings (4)

• CRITICAL The migration drops index 'message_text_search' but the pre-existing index name was 'idx_message_text_search'. · internal-packages/clickhouse/schema/042_reduce_task_events_v2_storage_overhead.sql:8
  • Fix: Review the cited evidence, fix the risk if confirmed, and rerun Shipwright.
• HIGH The migration drops index 'message_text_search' but the test query checks for 'message_text_search' while the original index name in the previous migration was 'idx_message_text_se · internal-packages/clickhouse/schema/042_reduce_task_events_v2_storage_overhead.sql:8
  • Fix: Fix the review finding before release.
• HIGH The test now asserts that 'attributes' has empty default_kind and default_expression, but the migration no longer modifies the attributes column. · internal-packages/clickhouse/src/taskEvents.test.ts:85
  • Fix: Review the cited evidence, fix the risk if confirmed, and rerun Shipwright.
• HIGH The migration removes the explicit EPHEMERAL column change and the rollback guard. · internal-packages/clickhouse/schema/042_reduce_task_events_v2_storage_overhead.sql:12
  • Fix: Review the cited evidence, fix the risk if confirmed, and rerun Shipwright.

Fireworks usage: 6,771 input · 480 output · 7,251 total tokens · $0.0018 · 9s · 0 fix iteration(s)

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