update footers

Author: dsyme

workflows/repo-assist.md

@@ -47,6 +47,11 @@ tools:
   repo-memory: true
 
 safe-outputs:
+  messages:
+    footer: "> Generated by 🌈 Repo Assist at [{run-started}]({run_url}). [Install Repo Assist in your repo](https://github.com/githubnext/agentics/blob/main/docs/repo-assist.md)."
+    run-started: "Repo Assist is processing {event_type}..."
+    run-success: "✓ Repo Assist completed successfully"
+    run-failure: "✗ Repo Assist encountered {status}"
   add-comment:
     max: 10
     target: "*"