kami
219e2c762e
New core:artifacts-store interface + infrastructure/artifacts-cas implementation: segment files + SQLite index, Blake3 hashing, group-commit fsync via flushBefore, recovery tail-scan, manual compactor, and oldest-first disk-cap evictor. Inference events now carry promptArtifactId / responseArtifactId; orchestrators put bytes before emitting. SqliteEventStore wraps its txn in artifactStore.flushBefore so segment data is fsynced before the event commit, making the crash window non-corrupting (TailScanner re-indexes orphan tail records on reopen). Compactor and evictor are mutually exclusive via maintenanceMutex. Step 9 (cloud sync) deferred to a later epic. See docs/reviews/2026-05-18-cas-steps-1-8-review.md for the final review.