Changes to MCP gateway (aggregated)

added the new internal_error enum value to the error/type response property for the response status 401 (media type: application/json)

added the new internal_error enum value to the error/type response property for the response status 401 (media type: text/event-stream)

added the new internal_error enum value to the error/type response property for the response status 429 (media type: application/json)

added the new internal_error enum value to the error/type response property for the response status 429 (media type: text/event-stream)

added the new internal_error enum value to the error/type response property for the response status 501 (media type: application/json)

added the new internal_error enum value to the error/type response property for the response status 501 (media type: text/event-stream)

added the new permission_error enum value to the error/type response property for the response status 401 (media type: application/json)

added the new permission_error enum value to the error/type response property for the response status 401 (media type: text/event-stream)

added the new permission_error enum value to the error/type response property for the response status 429 (media type: application/json)

added the new permission_error enum value to the error/type response property for the response status 429 (media type: text/event-stream)

added the new permission_error enum value to the error/type response property for the response status 501 (media type: application/json)

added the new permission_error enum value to the error/type response property for the response status 501 (media type: text/event-stream)

added the optional property error/provider to the response with the 401 status (media type: application/json)

added the optional property error/provider to the response with the 401 status (media type: text/event-stream)

added the optional property error/provider to the response with the 429 status (media type: application/json)

added the optional property error/provider to the response with the 429 status (media type: text/event-stream)

added the optional property error/provider to the response with the 501 status (media type: application/json)

added the optional property error/provider to the response with the 501 status (media type: text/event-stream)

endpoint added