fix: update octokit dependencies and clean up seat service type definition

Author: austenstone

backend/package-lock.json

@@ -26,7 +26,7 @@
     "express-rate-limit": "^7.5.0",
     "mongoose": "^8.13.2",
     "mysql2": "^3.14.0",
-    "octokit": "4.1",
+    "octokit": "^4.1.2",
     "smee-client": "^3.1.1",
     "update-dotenv": "^1.1.1",
     "validator": "^13.15.0",