fix: close scheduler persistence and capacity gaps

tests/wf_server/test_scheduler_composition.py

@@ -97,6 +97,16 @@ def test_build_scheduler_service_wires_server_stores(tmp_path: Path) -> None:
     assert service.ownership.lock_path == server.config.store_root / "scheduler.lock"
 
 
+def test_build_scheduler_service_shares_schedule_store_with_server_api(
+    tmp_path: Path,
+) -> None:
+    """Enabled scheduler composition exposes the same store to API and poller."""
+    server = build_local_static_workflow_server(tmp_path)
+    service = build_scheduler_service(server, SchedulerServiceConfig(auto_tick=False))
+
+    assert server.api.schedules._schedule_store() is service.schedule_store
+
+
 async def test_scheduler_service_start_stop_on_server_stores(
     tmp_path: Path,
 ) -> None: