schema/TelegramNotificationRuleBase - property channel listed as required is not defined

The property channel listed as required is not listed under property definitions.

TelegramNotificationRuleBase.yml

type: object
  required: [type, messageTemplate, channel]
  properties:
    type:
      description: The discriminator between other types of notification rules is "telegram".
      type: string
      enum: [telegram]
    messageTemplate:
      description: The message template as a flux interpolated string.
      type: string
    parseMode:
      description: Parse mode of the message text per https://core.telegram.org/bots/api#formatting-options. Defaults to "MarkdownV2".
      type: string
      enum:
        - MarkdownV2
        - HTML
        - Markdown
    disableWebPagePreview:
      description: Disables preview of web links in the sent messages when "true". Defaults to "false".
      type: boolean

BTW: if the connection and sending of a notification is handled by the NotificationEndpoint defined as endpointID in NotificationRuleBase.yml, is it necessary to have the connection defining properties defined in the rule?

NOTE: In the flux documentation the telegram.message function signature includes a channel argument. https://docs.influxdata.com/flux/v0.x/stdlib/contrib/sranka/telegram/message/

channel text token ?disableWebPagePreview ?parseMode ?silent ?url

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influxdata / openapi

schema/TelegramNotificationRuleBase - property channel listed as required is not defined #560