Remove useless reports, avoid DB-Races

tests/test_analyzer.py

@@ -165,7 +165,7 @@ def test_repeated_failure_days_threshold_creates_alert():
     assert any(alert.type == "repeated_dmarc_failure" for alert, _, _ in alerts)
 
 
-def test_missing_reporter_threshold_creates_alert():
+def test_missing_reporter_gap_does_not_create_alert():
     session = _session()
     settings = _settings()
     now = datetime(2026, 5, 16, 12, tzinfo=timezone.utc)
@@ -174,4 +174,4 @@ def test_missing_reporter_threshold_creates_alert():
 
     alerts = analyze_report(session, settings, report)
 
-    assert any(alert.type == "missing_reporter" for alert, _, _ in alerts)
+    assert not any(alert.type == "missing_reporter" for alert, _, _ in alerts)

tests/test_inbox_locks.py

@@ -0,0 +1,16 @@
+from app.inbox_locks import InboxRunLocks
+
+
+def test_inbox_run_locks_serialize_different_inboxes():
+    locks = InboxRunLocks()
+    first = locks.acquire("first", blocking=False)
+    assert first is not None
+
+    try:
+        assert locks.acquire("second", blocking=False) is None
+    finally:
+        first.release()
+
+    second = locks.acquire("second", blocking=False)
+    assert second is not None
+    second.release()