Transform content

Transforms content using a transformation agent in a single API call

This endpoint orchestrates the following operations:

1. Locates an existing project by external_id, or creates a new one
2. Creates an input asset from the provided content
3. Queues a transformation run for processing

Input requirements:

• article_to_audio agents require asset_type: "article"
• text_to_audio agents require asset_type: "text"