Upload media

Upload media files for WhatsApp messaging from public URLs.

Supports two delivery methods:

• meta_media: Standard upload to Meta's media endpoint (30-day lifetime)
• meta_resumable_asset: Resumable upload flow for profile pictures and large files

Security: SSRF-protected - blocks private IPs, localhost, and metadata endpoints

Size limits:

• Images: 5 MB
• Audio/Video: 16 MB
• Documents: 100 MB

Requests exceeding these limits fail immediately.