refactor: update exception constants to follow new naming convention

- Update old ErrorStatus, ErrorType, and Service/Endpoint constants to new naming convention
- Fix incorrect TypeSpecific usage in JWT middleware
- Add missing event specific error definitions to specific.yaml
- Regenerate exception constants

Co-authored-by: Gemini <gemini@google.com>

cmd/gen_exception/definitions/specific.yaml

@@ -25,3 +25,10 @@ auth:
 user:
     list:
         meilisearch_failed: "00001"
+event:
+    info:
+        not_found: "00001"
+    checkin:
+        gen_code_failed: "00001"
+    checkin_query:
+        record_not_found: "00001"