feat(spanner): add SavedSearchState table and locking logic #2056
+699
−0
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This commit introduces the schema and client logic for managing the state of Saved Search notifications, specifically focusing on the ingestion worker locking mechanism.
Changes:
SavedSearchStatetable withSavedSearchIdandSnapshotTypecomposite PK.entityMutatorgeneric helper toclient.goto support transactional "Read-Inspect-Write" patterns required for conditional locking.SetTimeNowForTestingto allow deterministic TTL expiration testing.saved_search_state.gocontaining:TryAcquireSavedSearchStateWorkerLockReleaseSavedSearchStateWorkerLockGetSavedSearchStateUpdateSavedSearchStateLastKnownStateBlobPathsaved_search_state_test.gocovering lock acquisition, expiration, re-acquisition, and release scenarios.