Detection priority in manualCheck():
1. Egg variables
2. modpack_installations table (NEW)
3. DaemonFileRepository file scan
4. Cached cron data from modpackchecker_servers (NEW)
Also returns current_version and update_available in response
so the console widget can show version comparison.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>