Independent two-round security review surfaced credential leak vectors and
a concurrency footgun in the federation tier code. All findings addressed:
Credential redaction (HIGH):
- New packages/storage/src/redact-error.ts strips user:password from
postgres://, postgresql://, redis://, rediss:// URLs (case-insensitive,
global). Internal — not exported from package index.
- Applied to: migrate-tier inner catch, tier-detection postgres+pgvector+
valkey probe error fields, cli.ts storage status + migrate-tier outer
catch. The TierHealthReport JSON emitted by `mosaic gateway doctor --json`
no longer leaks DSNs to monitoring pipelines.
- 10 unit tests covering both schemes, multi-URL, no-creds, case variants.
Advisory lock for migrate-tier (LOW-MEDIUM):
- PostgresMigrationTarget gains tryAcquireAdvisoryLock /
releaseAdvisoryLock using session-scoped pg_try_advisory_lock with key
hashtext('mosaic-migrate-tier'). Non-blocking — fails fast with a clear
message if another invocation is in progress. Released in finally; PG
releases automatically on session end. Dry-run skips lock acquisition.
SKIP_TABLES rationale (advisory):
- Comment expanded to document why sessions/verifications/admin_tokens
are skipped AND why accounts/provider_credentials are intentionally
migrated (durable user-bound credentials). Operators migrating to a
shared/multi-tenant federated tier should review whether to wipe these
manually post-migration.
Tests: 95 storage tests pass + 1 integration test skipped (FEDERATED_INTEGRATION).
Refs #460
