feat(admin-stock): apply idempotent availability deltas

app/Domains/Ticketing/FiestaFutbolInfantil/Requests/UpsertMerchandiseRequest.php

@@ -39,11 +39,13 @@ class UpsertMerchandiseRequest extends FormRequest
             'items.*.description' => ['sometimes', 'nullable', 'string'],
             'items.*.max_units_per_user' => ['required', 'integer', 'min:1'],
             'items.*.variants' => ['required', 'array', 'min:1', 'max:500'],
-            'items.*.variants.*' => ['required', 'array:id,color,size,stock,price'],
+            'stock_adjustment_id' => ['nullable', 'uuid'],
+            'items.*.variants.*' => ['required', 'array:id,color,size,stock,stock_difference,price'],
             'items.*.variants.*.id' => ['sometimes', 'nullable', 'integer', 'distinct'],
             'items.*.variants.*.color' => ['required', 'string', 'max:255'],
             'items.*.variants.*.size' => ['required', 'string', 'max:255'],
             'items.*.variants.*.stock' => ['required', 'integer', 'min:0'],
+            'items.*.variants.*.stock_difference' => ['nullable', 'integer'],
             'items.*.variants.*.price' => ['required', 'numeric', 'min:0', 'max:99999999.99'],
         ];
     }