feat(crons): add dateCreated, dateUpdate, and dateClock to serializer (#91737)

Author: evanpurkhiser

src/sentry/monitors/serializers.py

@@ -275,10 +275,10 @@ class MonitorCheckInSerializerResponse(MonitorCheckInSerializerResponseOptional)
     environment: str
     status: str
     duration: int
-    # TODO(epurkhiser): Should be replaced with the actual date_created, right
-    # now this is the same as dateAdded
     dateCreated: datetime
     dateAdded: datetime
+    dateUpdated: datetime
+    dateClock: datetime
     expectedTime: datetime
     monitorConfig: MonitorConfigSerializerResponse
 
@@ -344,8 +344,10 @@ def serialize(self, obj, attrs, user, **kwargs) -> MonitorCheckInSerializerRespo
             "environment": attrs["environment_name"],
             "status": obj.get_status_display(),
             "duration": obj.duration,
-            "dateCreated": obj.date_added,
+            "dateCreated": obj.date_created,
             "dateAdded": obj.date_added,
+            "dateUpdated": obj.date_updated,
+            "dateClock": obj.date_clock,
             "expectedTime": obj.expected_time,
             "monitorConfig": cast(MonitorConfigSerializerResponse, config),
         }