- Import all 6 Phase 3 routers from shared.api (portal, billing, channels, llm_keys, usage, webhook) - Add include_router() calls after existing whatsapp_router - Update module docstring to document portal API endpoints
- Import all 6 Phase 3 routers from shared.api (portal, billing, channels, llm_keys, usage, webhook) - Add include_router() calls after existing whatsapp_router - Update module docstring to document portal API endpoints