Remove useless reports, avoid DB-Races

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()