Backup-reports plugin logic

Tristis Oris

Mail can't be empty, so it not optional.

plugin.configure
{
  "id": "backup-reports",
  "configuration": {
    "toMails": []
  }
}
{
  "code": 10,
  "data": {
    "errors": [
      {
        "instancePath": "/toMails",
        "schemaPath": "#/properties/toMails/minItems",
        "keyword": "minItems",
        "params": {
          "limit": 1
        },
        "message": "must NOT have fewer than 1 items"
      }
    ]
  },
  "message": "invalid parameters",
  "name": "XoError",
  "stack": "XoError: invalid parameters
    at invalidParameters (/opt/xo/xo-builds/xen-orchestra-202412231012/packages/xo-common/api-errors.js:26:11)
    at default._configurePlugin (file:///opt/xo/xo-builds/xen-orchestra-202412231012/packages/xo-server/src/xo-mixins/plugins.mjs:175:13)
    at default.configurePlugin (file:///opt/xo/xo-builds/xen-orchestra-202412231012/packages/xo-server/src/xo-mixins/plugins.mjs:199:16)
    at Xo.configure (file:///opt/xo/xo-builds/xen-orchestra-202412231012/packages/xo-server/src/api/plugin.mjs:12:3)
    at Task.runInside (/opt/xo/xo-builds/xen-orchestra-202412231012/@vates/task/index.js:172:22)
    at Task.run (/opt/xo/xo-builds/xen-orchestra-202412231012/@vates/task/index.js:156:20)
    at Api.#callApiMethod (file:///opt/xo/xo-builds/xen-orchestra-202412231012/packages/xo-server/src/xo-mixins/api.mjs:469:18)"
}

Plugin settings is ignored at Delta backups. Only mails specified at job will get notification. I removed our support email from backup jobs and getting only personal notifications.

But at metadata backup this setting works. Emails will be sent according to plugin settings.