curl --request GET \
  --url https://core.ravenna.ai/api/slack/channels \
  --header 'x-ravenna-api-token: <api-key>'

[
  {
    "id": "<string>",
    "name": "<string>",
    "is_channel": true,
    "is_group": true,
    "associatedChannel": {
      "id": "<string>",
      "type": "DM",
      "appId": "<string>",
      "app": "<any>",
      "private": true,
      "channelId": "<string>",
      "channelName": "<string>",
      "mirrorTs": "<string>",
      "workspaceId": "<string>",
      "workspace": {
        "id": "<string>",
        "name": "<string>"
      },
      "queueId": "<string>",
      "queue": {
        "id": "<string>",
        "name": "<string>",
        "emoji": "<string>",
        "workspaceId": "<string>"
      },
      "agentId": "<string>",
      "slackUserId": "<string>",
      "userId": "<string>",
      "ticketId": "<string>",
      "contextTeamId": "<string>",
      "createdAt": "<string>",
      "updatedAt": "<string>",
      "deletedAt": "<string>"
    },
    "isAssociated": true
  }
]