Generate background music for a reel

Part of the AI character reel system. An Airtable button on a script record calls the webhook, and the workflow creates a music record linked to that script.

It sends the script's music prompt to ElevenLabs to build a composition plan, then composes the track from that plan and uploads the MP3 to Cloudinary. A Code step reads the BPM from the plan's styles and adds up the section lengths to get the duration. The music link, a preview, the BPM and the duration are saved to the music record and its status is set to To Do for your review.