chore: save WIP changes before audit fixes
- notifications: Telegram integration, richer stage/agent/QG notifications
- plane_sync: explicit Plane state IDs, needs_input/in_review/blocked helpers, links in comments
- launcher: deployer stage, model flag (opus), PR auto-create, REQUEST_CHANGES/tester/architect rollback+retry logic, partial check_reviewer_verdict path
- qg/checks: add check_reviewer_verdict (substring-based, will be hardened in S-5)
- stages: review->check_reviewer_verdict, testing->deployer agent
- config: telegram_bot_token/chat_id settings