- hasMediaContent now also checks evidence.attachments from metadata
(not just DB attachment records), catching the race where attachment
DB rows aren't inserted yet when analysis runs.
- Cache-hit guard: treat cached entries as miss when the message has
media evidence in metadata, so stale 24h-freezes are avoided.
- Cache-write guard: skip storing text-only analysis results for
messages whose metadata shows attachments/stickers/embeds. This
prevents a text-only 'clean' result (from failed vision) being
frozen for 24h, blocking future re-analysis with full media context.
Co-Authored-By: Claude <noreply@anthropic.com>
