feat: add repository configuration system with defensive validation

- Add archon_configured_repositories table migration with production-ready sandbox type constraints
- Implement SupabaseWorkOrderRepository for CRUD operations with comprehensive error handling
- Add defensive validation in _row_to_model with detailed logging for invalid enum values
- Implement granular exception handling (409 duplicates, 422 validation, 502 GitHub API errors)
- Document async/await pattern for interface consistency across repository implementations
- Add Supabase health check to verify table existence
- Expand test coverage from 10 to 17 tests with error handling and edge case validation
- Add supabase dependency to agent-work-orders group
- Enable ENABLE_AGENT_WORK_ORDERS flag in docker-compose for production deployment

docker-compose.yml

@@ -163,6 +163,7 @@ services:
     ports:
       - "${AGENT_WORK_ORDERS_PORT:-8053}:${AGENT_WORK_ORDERS_PORT:-8053}"
     environment:
+      - ENABLE_AGENT_WORK_ORDERS=true
       - SERVICE_DISCOVERY_MODE=docker_compose
       - ARCHON_SERVER_URL=http://archon-server:${ARCHON_SERVER_PORT:-8181}
       - ARCHON_MCP_URL=http://archon-mcp:${ARCHON_MCP_PORT:-8051}