add website link to zenduty alert, add safety check in zd alert logic

pyth_observer/dispatch.py

@@ -208,7 +208,9 @@ async def process_zenduty_events(self, current_time):
                 logger.debug(f"Raising Zenduty alert {identifier}")
                 self.open_alerts[identifier]["sent"] = True
                 self.open_alerts[identifier]["last_alert"] = current_time.isoformat()
-                to_alert.append(self.zenduty_events[identifier].send())
+                event = self.zenduty_events.get(identifier)
+                if event:
+                    to_alert.append(event.send())
 
         await asyncio.gather(*to_alert)
         for identifier in to_remove:

pyth_observer/event.py

@@ -170,6 +170,10 @@ async def send(self):
         state = self.check.state()
         if isinstance(state, PublisherState):
             alert_identifier += f"-{state.publisher_name}"
+            symbol = self.check.state().symbol.replace(".", "-").replace("/", "-").lower()
+            cluster = "solana-mainnet-beta" if self.context.network == "mainnet" else self.context.network
+            publisher_key = state.public_key.key
+            summary += f"https://pyth.network/metrics?price-feed={symbol}&cluster={cluster}&publisher={publisher_key}\n"
 
         logger.debug(f"Sending Zenduty alert for {alert_identifier}")
         await send_zenduty_alert(