ProductSupplierBriefSchema(ProductSupplierBriefSchema)

{
    "_links": {
        "self": "/api/inventory/product-suppliers/by-id/42"
    },
    "catalog_number": "CAT-789",
    "cost": 15.5,
    "id": 42,
    "product": {
        "code": "MAD-2X6",
        "id": 5
    },
    "supplier": {
        "code": "SUP-001",
        "id": 12
    },
    "unit_code": "PC",
    "upc": "012345678901",
    "updated_at": "2026-03-01T10:00:00-04:00"
}