curl -X DELETE "https://api.chatgrid.ai/v1/me/api-keys/ee112233-4455-6677-8899-aabbccddeeff" \
  -H "Authorization: Bearer cgk_live_a1b2c3d4e5f6g7h8i9j0k1l2m3n4o5p6"

{
  "object": "api_key_revoked",
  "data": {
    "id": "ee112233-4455-6677-8899-aabbccddeeff",
    "revoked": true
  }
}

{
  "object": "error",
  "status": 404,
  "code": "not_found",
  "message": "API key not found or already revoked"
}