fix: admins bypass RBAC channel filter for doc search

feat: add confluence/slack search tools, chat history, cloud Qdrant support, sync trigger fixes

feat: implement NL-to-SQL agent with PostgreSQL integration and enhance related documentation

Implement anomaly detection and forecasting features

feat: enhance analytics API with freshness computation and coverage gaps endpoint

feat: RBAC foundation — workspaces, channels, role-based access

feat: enhance agent event structure and improve SearchBox functionality

feat: add Zustand stores for filters and UI state management

Fix parallel agent_results update collision with Annotated reducer

Fix Qdrant search API, add Supabase writes to agent pipelines, pin qdrant-client 1.17.1

Fix startup imports and add graph_store module

Add agent and ingestion modules for Enterprise Knowledge Copilot