When parsing resumes from an offset (mid-file), the "Start Log" line
was already processed in a previous run, leaving current_session_id
as None. Added get_or_create_session() to look up or create a session
when resuming from a non-zero offset.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>