Generates a pre-signed URL for uploading media or attachment content. Used for local file uploads.

Upload Process

1. Call this endpoint with either:
   • file_name for local file upload
   • asset_url for remote file reference
2. Receive asset_id and optional upload_url
3. If upload_url provided, PUT your content to that URL
4. Use the asset_id with one of:
   • POST /job/add_media for media files
   • POST /job/add_backup_record for backup recordings
   • POST /job/add_notes_attachments for supporting documents

Important Timing Notes

• Upload URL expires in 24 hours
• Must use asset within 24 hours of upload
• Unused uploaded files are automatically deleted

Requirements

• Must provide either file_name or asset_url
• Cannot provide both parameters
• URLs must be GET-accessible
• Avoid one-time or short-lived URLs