Add fixes.

backend/moonstream/admin/migrations/add_abi_backet_and_s3_path.json

@@ -2,7 +2,7 @@
   "match": { "type": "subscription" },
   "update": {
     "abi": null,
-    "backet": null,
+    "bucket": null,
     "s3_path": null
   },
   "drop_keys": []

backend/moonstream/routes/subscriptions.py

@@ -68,6 +68,8 @@ async def add_subscription_handler(
         "color": color,
         "label": label,
         "abi": None,
+        "bucket": None,
+        "s3_path": None,
     }
 
     try: