JournalCompactionService and TierContextSummarizer wrapped their event emit
in artifactStore.flushBefore { }. But emit -> SqliteEventStore.append already
calls flushBefore internally, re-acquiring CasArtifactStore's non-reentrant
Mutex -> the coroutine parks forever (no CPU, no thread, no exception, no
terminal event). Only fires once the journal crosses the compaction threshold,
i.e. exactly on long runs.
Emit directly; append()'s own flushBefore still fsyncs artifacts before the
referencing event is persisted, so durability ordering is preserved. Adds a
regression test with a lock-holding fake store (the prior fake took no lock,
which is why the deadlock escaped tests).
Vikunja #244.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LG7sGEbVJQncHJtsbPFJZm
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