- Migration: adds current_file_id, latest_file_id, is_ignored columns
- ModpackApiService: all 4 platforms now return file_id in response
- CheckModpackUpdates: file ID comparison (preferred) with string fallback
- detectCurseForge: extracts manifest['version'] as installed_version
- Cron skips is_ignored servers
- Detection priority: manifest version > egg var > DB record > seed latest
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>