Implement "Reset to Initial/New Config" API and Services for Transformer

Title: #539 (closed) Implement "Reset to Initial/New Config" API and Services for Transformer

Description: Implement a reset configuration API and logic for the Transformer service that supports resetting the service configuration to its initial state or applying a new configuration file provided by the admin.

Requirements:

1. Reset Configuration API:

   • Create resetToConfig method for the Transformer service.
   • Provide API endpoint: POST /admin/transformerConfig/reset.
   • Default behavior: reset to the initial configuration file used on the first start.
   • Optional: allow the admin to provide a new configuration file that will replace the initial one.
   • Validate the configuration before applying and ensure proper error handling.
   • Log success and failure of the reset operation.
   • Update Swagger to reflect this endpoint for the Transformer service.

2. Logging & Error Handling:

   • Ensure proper logging for reset operations (both success and failure).
   • Handle invalid configurations and provide detailed error feedback.

3. Unit & Integration Tests:

   • Write tests to verify the reset behavior for both default and provided configuration scenarios.
   • Ensure configurations are applied correctly and persist across service restarts.

Acceptance Criteria:

• The Transformer service supports "reset to initial/new config" functionality.
• The POST /admin/transformerConfig/reset endpoint is properly documented in Swagger.
• Tests verify the reset behavior for both default and provided configuration file scenarios.