172c240d1b
- Store SHA-256 digests (key_hash + key_preview) instead of raw keys, in both the in-memory store and Postgres; migrate legacy plaintext rows in place and drop the plaintext column. - Fix TEXT[] scans that failed at runtime (missing pq.Array) in GetKey/ListKeys/LoadAllKeys. - Load persisted keys at startup (InitializeFromDatabase was never called) and fall back to the database on cache miss, so issued keys survive restarts. - Make HybridKeyStore.CreateKey genuinely write-through: cache is only updated after a successful DB write. - Guard nil database backend (auth enabled without DB previously panicked on key creation) and degrade to in-memory operation. - Persist bootstrap admin keys when a database is configured. - Record real audit-log details as JSON and log audit failures instead of silently dropping them; add DB pool limits and ping timeout. - Sentinel errors matched with errors.Is; unit tests for hashing, write-through ordering, DB fallback, and nil-DB operation. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>