test(logging): pin the failure-scrub test timestamps

tests/unit/integrations/test_mlflow.py

@@ -311,8 +311,8 @@ def test_mlflow_failure_event_records_the_error_text_the_payload_logged(scrubbed
                 },
             },
             response_obj=None,
-            start_time=datetime.now(),
-            end_time=datetime.now(),
+            start_time=datetime(2025, 1, 1),
+            end_time=datetime(2025, 1, 1),
         )
 
         event = span.add_event.call_args.args[0]

tests/unit/litellm_core_utils/test_litellm_logging.py

@@ -11675,7 +11675,7 @@ def _prompt_failure_logging_obj(litellm_params: Mapping[str, object] | None = No
         messages=[{"role": "user", "content": SCRUB_PROMPT}],
         stream=False,
         call_type="completion",
-        start_time=time.time(),
+        start_time=datetime.datetime(2025, 1, 1),
         litellm_call_id="failure-scrub",
         function_id="failure-scrub",
     )