notify: ensure that body always ends as a string, when handling json

machines/gerd/services/notify/app.py

@@ -265,6 +265,9 @@ def send_notification():
         except Exception:
             return ("Unable to compile JQ, please ensure it is correct", 400)
 
+        if not isinstance(body, str):
+            body = json.dumps(body, indent=4)
+
     con = get_db()
     cur = con.cursor()
     res = cur.execute(