DAG Processor fails with this error airflow.exceptions.DeserializationError: An unexpected error occurred while trying to deserialize Dag 'eFundamentals_mla_availability_report'

### Apache Airflow version 3.1.0 ### If "Other Airflow 2/3 version" selected, which one? _No response_ ### What happened? After upgrading from Airflow 3.0.6 to Airflow 3.10 we started getting this issue in the Dag processor which keeps restarting on its own Logs: ``` 2025-10-09T14:12:04.364297Z [error ] Failed to deserialize DAG [airflow.serialization.serialized_objects] loc=serialized_objects.py:3890 return cls._deserialize_datetime(value) if value is not None else None File "/home/airflow/.venv/lib/python3.10/site-packages/airflow/_shared/timezones/timezone.py", line 302, in from_timestamp result = coerce_datetime(dt.datetime.fromtimestamp(timestamp, tz=utc)) TypeError: 'str' object cannot be interpreted as an integer The above exception was the direct cause of the following exception: Traceback (most recent call last): File "/home/airflow/.venv/lib/python3.10/site-packages/airflow/jobs/dag_processor_job_runner.py", line 61, in _execute self.processor.run() File "/home/airflow/.venv/lib/python3.10/site-packages/airflow/dag_processing/manager.py", line 272, in run return self._run_parsing_loop() File "/home/airflow/.venv/lib/python3.10/site-packages/airflow/dag_processing/manager.py", line 361, in _run_parsing_loop self._collect_results() File "/home/airflow/.venv/lib/python3.10/site-packages/airflow/utils/session.py", line 100, in wrapper return func(*args, session=session, **kwargs) File "/home/airflow/.venv/lib/python3.10/site-packages/airflow/dag_processing/manager.py", line 827, in _collect_results self._file_stats[file] = process_parse_results( File "/home/airflow/.venv/lib/python3.10/site-packages/airflow/dag_processing/manager.py", line 1155, in process_parse_results update_dag_parsing_results_in_db( File "/home/airflow/.venv/lib/python3.10/site-packages/airflow/dag_processing/collection.py", line 372, in update_dag_parsing_results_in_db for attempt in run_with_db_retries(logger=log): File "/home…