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>

.gitignore

@@ -0,0 +1,43 @@
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+.venv/
+venv/
+ENV/
+
+# Node
+node_modules/
+bun.lockb
+
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo
+
+# Secrets (never commit)
+*.pem
+*.key
+.env
+.env.*
+credentials.json
+
+# Data directories
+dragonfly-data/
+*.db-journal
+
+# Build artifacts
+dist/
+build/
+*.egg-info/
+
+# Logs
+*.log
+logs/
+
+# OS
+.DS_Store
+Thumbs.db