test: update gemini model to 1.5-flash in integration tests

Optimize agent drilldown by parallelizing co-worker rubric generation with main agent execution. Added integration test to verify parallel flow.

test: refine integration tests for coworker and file sync

fix: stabilize integration tests and improve agent drilldown UI compatibility

feat: Improve local testing and robustify agent loop ...

- Support native mode in run_integration_tests.sh

- Add error handling for ObjectDeletedError in agent_loop.py

- Use db_executor for heartbeat updates in node_registry.py

- Add new settings to config.py

- Add test for AuthService.handle_callback

- Update docker compose configs

feat: stabilize browser streaming, fix quality audit UI readability, and harden integration test harness

feat: comprehensive mobile responsiveness for agent dashboard and swarm control

feat: complete Co-Worker integration tests and finalize project roadmap