config: Add RomM metadata provider API keys

Migrated from old KavNas config:
- ScreenScraper (kavren)
- RetroAchievements (kavren)
- SteamGridDB
- PlayMatch

Also added Emulationdrive exclusion to config.yml

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docs/CONFIGURATIONS.md

@@ -404,6 +404,12 @@ services:
       - SCHEDULED_RESCAN_CRON=0 3 * * *
       - ENABLE_RESCAN_ON_FILESYSTEM_CHANGE=true
       - RESCAN_ON_FILESYSTEM_CHANGE_DELAY=5
+      - SCREENSCRAPER_USER=kavren
+      - SCREENSCRAPER_PASSWORD=outlaw
+      - RETROACHIEVEMENTS_USERNAME=kavren
+      - RETROACHIEVEMENTS_API_KEY=obwPWYqylOhy9LA0Mapr64LrUuKNUZLc
+      - STEAMGRIDDB_API_KEY=447ec66ceaef54d52e249a403ec4d4ec
+      - PLAYMATCH_API_ENABLED=true
     volumes:
       - /mnt/kavnas/Roms/roms:/romm/library
       - /mnt/kavnas/Roms/assets:/romm/assets