When JSONL mtime changes without content change (e.g., git pull, touch),
the staleness check would repeatedly trigger but auto-import would skip
due to hash match, creating an infinite loop of "Database out of sync"
errors.
Now we update last_import_time even when skipping import due to hash
match, breaking the staleness loop.
Fixes#378🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
a3103d3e59