feat: add Gitea volumes to Restic backup configuration

- Add gitea-backup plan with dev_gitea_data, dev_gitea_config, and dev_gitea_runner_data volumes
- Schedule: Daily at 11 AM
- Retention: 7 daily, 4 weekly, 6 monthly, 2 yearly backups
- Add missing asciinema_data volume to backup configuration

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

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

restic/config.json

@@ -326,6 +326,26 @@
           "yearly": 2
         }
       }
+    },
+    {
+      "id": "gitea-backup",
+      "repo": "hidrive-backup",
+      "paths": [
+        "/volumes/dev_gitea_data",
+        "/volumes/dev_gitea_config",
+        "/volumes/dev_gitea_runner_data"
+      ],
+      "schedule": {
+        "cron": "0 11 * * *"
+      },
+      "retention": {
+        "policyTimeBucketed": {
+          "daily": 7,
+          "weekly": 4,
+          "monthly": 6,
+          "yearly": 2
+        }
+      }
     }
   ]
 }