Changes to Create a campaign

the name request property's maxLength was set to 40

added the new processing enum value to the data/status response property for the response status 201

added the non-success response with the status 403

added the new optional request property maxRetries

added the new optional request property phoneNumberIds

added the new optional request property retryDelay

added the new optional request property scheduledAt

added the optional property data/maxRetries to the response with the 201 status

added the optional property data/retryAttempts to the response with the 201 status

added the optional property data/retryDelay to the response with the 201 status

added the optional property data/scheduledAt to the response with the 201 status

added the optional property data/status to the response with the 201 status