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

Start with TelegramNotificationRuleBase.yml and compare its required and properties sections, then read NotificationRuleBase.yml to check how endpointID is modeled. Verify the intended channel and connection fields against the referenced Flux telegram.message signature; done means the schema is internally consistent and the OpenAPI validation passes.

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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