Returns an array of past invoice versions for the specified invoice.
Each version represents a historical snapshot of the invoice at a specific point in time, including the PDF generated at that time.
Each version includes a generated_url field with a signed URL that expires in 1 hour.
API key for authentication
Response serializer for listing invoice versions.
Returns an array of past invoice versions.
Array of past invoice versions, ordered by created_at descending (newest first)