feat(variants): add minimum and maximum use dates to variants and update related logic

database/migrations/2026_07_27_000300_add_use_dates_to_variantes_table.php

@@ -0,0 +1,26 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::table('variantes', function (Blueprint $table): void {
+            $table->dateTime('minimum_use_date')->nullable()->after('inventory_id');
+            $table->dateTime('maximum_use_date')->nullable()->after('minimum_use_date');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('variantes', function (Blueprint $table): void {
+            $table->dropColumn([
+                'minimum_use_date',
+                'maximum_use_date',
+            ]);
+        });
+    }
+};