Update contact subscription status

curl --request PATCH \
  --url http://localhost:8080/api/v1/client/contacts/{id}/subscription \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "is_subscribed": true,
  "unsubscribe_reason": "<string>"
}
'

{
  "data": {
    "active_states": 123,
    "active_workflow_count": 123,
    "client_contact_id": "<string>",
    "client_id": 123,
    "company": "<string>",
    "created_at": "<string>",
    "created_by": 123,
    "custom_fields": [
      123
    ],
    "email": "<string>",
    "external_id": "<string>",
    "first_name": "<string>",
    "health_score": 123,
    "id": 123,
    "is_subscribed": true,
    "last_activity_at": "<string>",
    "last_email_opened_at": "<string>",
    "last_name": "<string>",
    "last_purchase_at": "<string>",
    "last_workflow_at": "<string>",
    "phone": "<string>",
    "signup_source": "<string>",
    "tags": [
      "<string>"
    ],
    "timezone": "<string>",
    "total_emails_clicked": 123,
    "total_emails_opened": 123,
    "total_emails_sent": 123,
    "unsubscribe_reason": "<string>",
    "unsubscribed_at": "<string>",
    "updated_at": "<string>"
  },
  "errors": [
    {
      "condition": "format",
      "error": "Invalid email format",
      "key": "email"
    }
  ],
  "message": "Operation successful",
  "meta": {},
  "success": true
}