chore(release): advance game schema head

app/gateway-api/test/releaseManifest.test.ts

@@ -39,7 +39,7 @@ describe('readReleaseManifest', () => {
         await expect(readReleaseManifest(workspaceRoot)).resolves.toMatchObject({
             controllerProtocol: RELEASE_CONTROLLER_PROTOCOL,
             gatewaySchemaHead: '20260825000000_add_bulk_release_batches',
-            gameSchemaHead: '20260903140000_split_message_wall_and_game_time',
+            gameSchemaHead: '20260903183000_turn_daemon_lease_utc_wall',
         });
     });