Save attachments

Read ../gog/SKILL.md, ../gog-gmail/SKILL.md, and ../gog-drive/SKILL.md first.

1. Search narrowly and identify exact threads:

   gog --account user@example.com --readonly gmail search \
     'has:attachment newer_than:30d' --max 20 --json --wrap-untrusted
   

2. Inspect attachment names and sizes before downloading:

   gog --account user@example.com --readonly gmail thread attachments THREAD_ID --json --wrap-untrusted
   

3. Download into a new task-specific temporary directory: