Enhance logging, debug info, and add Troubleshooting docs section
- Move Log Level dropdown from Downloads tab to Advanced tab (Settings)
- Fix staging path config key (import.staging_folder → import.staging_path)
- Fix library stats showing 0 (use get_database_info_for_server like dashboard)
- Add Troubleshooting & Support docs section (log files, debug info, common issues, reporting)
- Beef up Copy Debug Info: ffmpeg version, runner type, Discogs status, wishlist count,
music library paths, music videos dir, log level, metadata source, hybrid priority,
lossy copy config, auto import, duplicate tracks, replace quality, log file listing
- Add GitHub issue link footer to debug output
- Add discogs to enrichment worker list in debug endpoint
381e37ecf7