Automate updating embeddings, search index on a hourly schedule

- Use the schedule pypi package
- Use QTimer to poll schedule.run_pending() regularly for jobs to run

src/routers/api.py

@@ -126,4 +126,6 @@ def search(q: str, n: Optional[int] = 5, t: Optional[SearchType] = None, r: Opti
 @api.get('/update')
 def update(t: Optional[SearchType] = None, force: Optional[bool] = False):
     state.model = configure_search(state.model, state.config, regenerate=force, t=t)
+    logger.info("Search Index updated via API call")
+
     return {'status': 'ok', 'message': 'index updated'}