POST /processes/{process_id}/cancel

curl -X POST "$PHONEFARM_BASE_URL/processes/$PROCESS_ID/cancel" \
  -H "Authorization: Bearer $PHONEFARM_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "reason": "operator requested stop",
    "strategy": "soft_then_force",
    "force_after_seconds": 10,
    "requested_by": {
      "system": "ugc-tracker",
      "user": "operator@example.com",
      "metadata": {}
    }
  }'

{
  "status": "cancel_requested",
  "cancelled_queue_item_ids": ["7c1a07f6-1d55-4f79-a403-8a8420f1b62b"],
  "active_queue_item_ids": [],
  "active_target": {
    "process_id": "3e6f2e7b-4e3c-4c7c-b8d7-0c53d83f9870",
    "phone_id": "phone_01",
    "account_id": "account_user095916355",
    "queue_item_id": null,
    "capability_request_id": "3e6f2e7b-4e3c-4c7c-b8d7-0c53d83f9870"
  },
  "termination": {
    "process_id": "3e6f2e7b-4e3c-4c7c-b8d7-0c53d83f9870",
    "status": "not_needed",
    "terminate_issued": false,
    "container": null
  },
  "process": {
    "process_id": "3e6f2e7b-4e3c-4c7c-b8d7-0c53d83f9870",
    "status": "cancelled"
  }
}