fix(sec): warn when deferred imports stay stale

tests/unit/test_scheduler.py

@@ -20,6 +20,7 @@ from app.scheduler import (
     queue_backtest_target_model,
     scheduler,
 )
+from app.services.data_import import STATUS_DEFERRED
 
 
 def test_manual_backtest_target_model_is_one_shot():
@@ -256,7 +257,7 @@ class TestShadowImportJobs:
 
         async def imported(importer):
             return SimpleNamespace(
-                status="deferred",
+                status=STATUS_DEFERRED,
                 revision="abcdef1234567890",
                 error_details="Company Facts publication lag; retrying",
             )
@@ -268,7 +269,7 @@ class TestShadowImportJobs:
         await _run_shadow_import("sec_fundamentals_import", object())
 
         runtime = get_job_runtime_snapshot("sec_fundamentals_import")
-        assert runtime["status"] == "deferred"
+        assert runtime["status"] == STATUS_DEFERRED
         assert runtime["processed"] == 0
         assert runtime["message"] == "Company Facts publication lag; retrying"