Rename backup services: backup (comprehensive) + gaming-backup (saves-only)

- backup: renamed from disaster-backup; full ~/docker/<service>/ snapshots,
  Minecraft flushed not stopped, everything else stop/snap/start for DB
  consistency; backup.conf / restore/ layout; post-install-backup timer
- gaming-backup: renamed from backup; frequent game-save snapshots (Minecraft
  world data, emulator saves, Steam, Wolf state) with no service downtime;
  defaults to hourly schedule; separate gaming-kopia repo + gaming-backup timer
- Deleted services/disaster-backup.sh
- README: updated backup row to reflect new names

https://claude.ai/code/session_019XgsQ13XKm4Zj3cNsDNwHj

README.md

@@ -72,7 +72,7 @@ Update them any time with `sudo ./setup.sh configure`.
 | `cameras` | `frigate`, `frigate-audio`, `frigate-notify`, `sky-cam` |
 | `gaming` | `js99er`, `minecraft`, `wolf`, `wolf-pair` |
 | `extras` | `silent-send`, `sync-cc` |
-| `backup` | `backup` — Kopia (Minecraft world data + gaming saves, runs without stopping services); `disaster-backup` — complete recovery backup: entire `~/docker/<service>/` for every service (Minecraft: flush+snap, no downtime; all others: stop/snap/start for DB consistency) |
+| `backup` | `backup` — complete recovery: entire `~/docker/<service>/` for every service (Minecraft: flush+snap, no downtime; others: stop/snap/start for DB consistency); `gaming-backup` — frequent game-save snapshots (Minecraft world data, emulator saves, Steam — no downtime, run hourly) |
 
 Run `./setup.sh --list` to see descriptions.