Kit API spec update: 1 changed

[github-actions]

Kit API Spec Changes Detected

	Count
✅ Added endpoints	0
❌ Removed endpoints	0
✏️ Changed endpoints	1

✏️ Changed Endpoints

• GET /v4/subscribers
  • Added params: query:slim

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Next step: review changes and add CLI support where needed.

Spec: https://developers.kit.com/api-reference/v4.json