9d38a89c88
- Add existsByTurnIdPrefix(prefix) to L3MemoryStore interface; implemented in InMemoryL3MemoryStore (mutex-guarded) and TurboVecL3MemoryStore (metadata map). All test fakes (TrackingL3MemoryStore, CapturingStore) updated. - Introduce RepoMapIndexerPort interface; RepoMapIndexer implements it. Allows injection of test doubles without framework overhead. - ProjectMemoryService.indexAndRecord: reads latest WorkspaceStateObservedEvent from event store (invariant #9 — recorded fact, not re-probe); skips scan+embed when L3 already holds entries for "repomap:<root>:<stateKey>"; passes stateKey to RepoMapComputedEvent; embeds each scanned entry after append; per-entry failures warn-logged (CancellationException rethrown). - Tests: InMemoryL3MemoryStoreTest +2 cases; new ProjectMemoryServiceReuseTest covers same-key skip, changed-key re-index, no-observation always-reindex, and embedding turnId tag verification.