feat: add asciinema backup plan to Restic

Added asciinema-backup plan to backup terminal recording data.

Backup Configuration:
- ID: asciinema-backup
- Schedule: 11 AM daily (0 11 * * *)
- Path: /volumes/asciinema_data
- Retention: 7 daily, 4 weekly, 6 monthly, 2 yearly

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

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

restic/config.json

@@ -300,6 +300,22 @@
           "yearly": 2
         }
       }
+    },
+    {
+      "id": "asciinema-backup",
+      "repo": "hidrive-backup",
+      "paths": ["/volumes/asciinema_data"],
+      "schedule": {
+        "cron": "0 11 * * *"
+      },
+      "retention": {
+        "policyTimeBucketed": {
+          "daily": 7,
+          "weekly": 4,
+          "monthly": 6,
+          "yearly": 2
+        }
+      }
     }
   ]
 }