* 🔧 feat: Update user key handling in keys route and add comprehensive tests
- Enhanced the PUT /api/keys route to destructure request body for better clarity and maintainability.
- Introduced a new test suite for keys route, covering key update, deletion, and retrieval functionalities, ensuring robust validation and IDOR prevention.
- Added tests to verify handling of extraneous fields and missing optional parameters in requests.
* 🔧 fix: Enhance conversation deletion route with parameter validation
- Updated the DELETE /api/convos route to handle cases where the request body is empty or the 'arg' parameter is null/undefined, returning a 400 status with an appropriate error message for DoS prevention.
- Added corresponding tests to ensure proper validation and error handling for these scenarios, enhancing the robustness of the API.
* 🔧 fix: Improve request body validation in keys and convos routes
- Updated the DELETE /api/convos and PUT /api/keys routes to validate the request body, returning a 400 status for null or invalid bodies to enhance security and prevent potential DoS attacks.
- Added corresponding tests to ensure proper error handling for these scenarios, improving the robustness of the API.
