fix: wire show_day/show_hour config into API, simplify AddTrackRequest

- create_app now accepts show_day/show_hour params instead of
  hardcoding Wednesday 22:00
- main.py passes config values through to create_app
- Removed soundcloud_url from AddTrackRequest (not implemented);
  track_id is now required

Made-with: Cursor

src/ntr_fetcher/main.py

@@ -33,7 +33,13 @@ def run() -> None:
         poll_interval=settings.poll_interval_seconds,
     )
 
-    app = create_app(db=db, poller=poller, admin_token=settings.admin_token)
+    app = create_app(
+        db=db,
+        poller=poller,
+        admin_token=settings.admin_token,
+        show_day=settings.show_day,
+        show_hour=settings.show_hour,
+    )
 
     @app.on_event("startup")
     async def start_poller():