Add service tag to datadog events (#42)

* tweak datadog event metadata

* delete source

* lint

Co-authored-by: Jayant Krishnamurthy <[email protected]>

Author: jayantk

pyth_observer/notifiers/datadog.py

@@ -18,7 +18,12 @@ async def notify(self, error):
 
         error_id = error.unique_id
 
-        tags = [f"symbol:{error.symbol}", f"error_code:{error.error_code}", f"network:{error.network}"]
+        tags = [
+            f"symbol:{error.symbol}",
+            f"error_code:{error.error_code}",
+            f"network:{error.network}",
+            f"service:pyth-observer-{error.network}",
+        ]
         if error.publisher_key is not None:
             tags.append(f"publisher:{error.publisher_name}")