Initial commit: Agent Governance System Phase 8

Phase 8 Production Hardening with complete governance infrastructure:

- Vault integration with tiered policies (T0-T4)
- DragonflyDB state management
- SQLite audit ledger
- Pipeline DSL and templates
- Promotion/revocation engine
- Checkpoint system for session persistence
- Health manager and circuit breaker for fault tolerance
- GitHub/Slack integrations
- Architectural test pipeline with bug watcher, suggestion engine, council review
- Multi-agent chaos testing framework

Test Results:
- Governance tests: 68/68 passing
- E2E workflow: 16/16 passing
- Phase 2 Vault: 14/14 passing
- Integration tests: 27/27 passing

Coverage: 57.6% average across 12 phases

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

agents/tier0-agent/credentials/.token

@@ -0,0 +1 @@
+hvs.CAESIDquQkRp_KXaVTn_7qjDbDN_2cxHW56RI7hJ0LvS9iqNGh4KHGh2cy5vOWVoTUVkN0VOVEVSd2hvWGlFWnY3bXg

agents/tier0-agent/credentials/approle.json

@@ -0,0 +1,8 @@
+{
+  "role_id": "95f5ab5b-e79b-05f3-6019-53cd86fa0e38",
+  "secret_id": "26691ba6-b6f0-854d-e1ae-c32620393dae",
+  "secret_id_accessor": "8df870a9-78ca-3c6e-059b-40deefbd0c82",
+  "created_at": "2026-01-23T20:13:00Z",
+  "expires_at": "2026-01-24T20:13:00Z",
+  "note": "Regenerate secret_id before expiry with: vault write -f auth/approle/role/tier0-agent/secret-id"
+}