is_available flag is flipped.curl --location 'https://your-api-server.com' \
--header 'Content-Type: application/json' \
--data '{
"event": "item.toggled",
"timestamp": "2026-01-15T10:30:00Z",
"data": {
"item_id": 301,
"menu_id": 101,
"is_available": false
}
}'