refactor: remove search_surfsense_docs tool and related references

- Deleted the `search_surfsense_docs` tool and its associated files, streamlining the agent's toolset.
- Updated various components and prompts to remove references to the now-removed tool, ensuring consistency across the codebase.
- Adjusted documentation to direct users to the SurfSense documentation link for product-related queries instead.

surfsense_backend/app/app.py

@@ -43,7 +43,6 @@ from app.rate_limiter import get_real_client_ip, limiter
 from app.routes import router as crud_router
 from app.routes.auth_routes import router as auth_router
 from app.schemas import UserCreate, UserRead, UserUpdate
-from app.tasks.surfsense_docs_indexer import seed_surfsense_docs
 from app.users import SECRET, auth_backend, current_active_user, fastapi_users
 from app.utils.perf import log_system_snapshot
 
@@ -576,13 +575,6 @@ async def lifespan(app: FastAPI):
     initialize_llm_router()
     initialize_image_gen_router()
     initialize_vision_llm_router()
-    try:
-        await asyncio.wait_for(seed_surfsense_docs(), timeout=120)
-    except TimeoutError:
-        logging.getLogger(__name__).warning(
-            "Surfsense docs seeding timed out after 120s — skipping. "
-            "Docs will be indexed on the next restart."
-        )
 
     # Phase 1.7 — JIT warmup. Bounded so a stuck warmup never delays
     # worker readiness. ``shield`` so Uvicorn cancelling startup