## Summary
Preserves the original filename provided in the WhatsApp Cloud
attachment payload when downloading media files.
## Problem
Files containing accented or special characters could be saved with
malformed names or incorrect extensions due to relying on remote
download metadata.
## Changes Made
- Uses attachment_payload[:filename] when present
- Creates a tempfile using the original filename and extension
- Preserves content type metadata
- Falls back to existing behavior when no filename is provided
## Notes
This should improve attachment downloads for filenames containing
accented characters.
Related to #10973
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Co-authored-by: Rorrick Smith <rorrick@bulksms.com>
Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>
Co-authored-by: Muhsin <12408980+muhsin-k@users.noreply.github.com>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
