Changes to Resend a webhook

the endpoint scheme security internalProjectBearer was added to the API

the endpoint scheme security tenantApiKey was added to the API

the header request parameter x-api-key became optional

added the non-success response with the status 401

added the non-success response with the status 503

added the optional property code to the response with the 400 status

added the optional property code to the response with the 403 status

added the optional property code to the response with the 404 status

endpoint added