fix: serialize scheduler transitions and coalesce misfires

tests/scheduling/test_recovery.py

@@ -110,6 +110,47 @@ def test_recovery_fails_abandoned_admitted_without_replay(tmp_path: Path) -> Non
     assert run_store.get_run(admission.id).status.value == "failed"
 
 
+def test_recovery_fails_corrupt_view_without_admission(tmp_path: Path) -> None:
+    """A view with no admission is failed closed instead of left active."""
+    from tests.artifacts.test_run_store import artifact as _artifact
+    from tests.artifacts.test_run_store import deployment as _deployment
+    from wf_artifacts import PinnedRunEnvironment, ResumeReadiness, WorkflowRunRecord
+    from wf_artifacts.runs.models import StoredRunStatus
+
+    sched_store = FileScheduleStore(tmp_path / "sched")
+    run_store = FileRunStore(tmp_path / "runs")
+    sched_store.create_schedule(_sched_model("a"))
+    now = ts(2026, 9, 8, 12, 0)
+    run_id = run_store.allocate_run_id()
+    run_store.save_run(
+        WorkflowRunRecord(
+            id=run_id,
+            status=StoredRunStatus.ADMITTED,
+            resume_readiness=ResumeReadiness.NOT_APPLICABLE,
+            environment=PinnedRunEnvironment(
+                deployment=_deployment(), root_artifact=_artifact(), child_artifacts=[]
+            ),
+            latest_checkpoint_id=None,
+            created_at=now,
+            updated_at=now,
+        )
+    )
+
+    ownership = SchedulerOwnership(tmp_path, owner="test").acquire()
+    try:
+        diags = sched_recovery.recover(
+            schedule_store=sched_store,
+            run_store=run_store,
+            now=now,
+            ownership=ownership,
+        )
+    finally:
+        ownership.release()
+
+    assert any(f"{run_id}:failed-closed" in item for item in diags)
+    assert run_store.get_run(run_id).status.value == "failed"
+
+
 def test_recovery_never_executes_pending_until_poll(tmp_path: Path) -> None:
 
     from tests.artifacts.test_run_store import artifact as _artifact