SIENTIAPDE-1110

Update Druid activity to handle None values for last data timestamp, ensuring robust date parsing. Bump image tag in values.yaml to 0.2.3 for version consistency.

scouter/activities/pydruid.py

@@ -41,8 +41,12 @@ class Druid(BaseActivity):
         """
         metadata = input_data['metadata']
         datasource = f"raw_{input_data['schedule_name']}"
-        last_data_timestamp = datetime.strptime(
-            input_data['last_data_timestamp'], "%Y-%m-%d %H:%M:%S.%f")
+        last_data_timestamp_str = input_data['last_data_timestamp']
+        if last_data_timestamp_str is None:
+            last_data_timestamp = datetime(1970, 1, 1, 0, 0, 0)
+        else:
+            last_data_timestamp = datetime.strptime(
+                last_data_timestamp_str, "%Y-%m-%d %H:%M:%S.%f")
 
         self.debug(
             f"Loading data from Druid: {input_data}", metadata=metadata)