Prevent all scanner slave to process requests

scanner/scanner/__init__.py

@@ -24,6 +24,10 @@ async def lifespan(_):
 	):
 		# there's no way someone else used the same id, right?
 		is_master = await db.fetchval("select pg_try_advisory_lock(198347)")
+		is_http = not is_master and await db.fetchval("select pg_try_advisory_lock(645633)")
+		if is_http:
+			yield
+			return
 		if is_master:
 			await migrate()
 		processor = RequestProcessor(pool, client, tmdb)