Add unit tests for MCP versions list and update routes

- Implement comprehensive unit tests for the MCP versions list route, covering route registration, request handling, error responses, and response format.
- Add unit tests for the MCP versions update route, ensuring proper registration, request handling, error responses, and response format.
- Validate schema configuration and performance for both routes, including concurrent request handling and edge cases.
- Ensure consistent error responses and proper HTTP method usage in tests.

Author: Lasim

.gitignore

@@ -61,6 +61,7 @@ services/backend/persistent_data/*
 services/backend/tests/e2e/test-data/*.db
 
 ._*.ts
+._*.sh
 ._*.vue
 ._*.md
 ._*.js