feat: [재고] 적정재고 관리 기능 추가 (max_stock + over 상태 + update API)

database/migrations/2026_03_20_162822_add_max_stock_to_stocks_table.php

@@ -0,0 +1,30 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('stocks', function (Blueprint $table) {
+            $table->decimal('max_stock', 15, 3)->default(0)
+                ->comment('최대 재고 (적정재고 상한)')
+                ->after('safety_stock');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('stocks', function (Blueprint $table) {
+            $table->dropColumn('max_stock');
+        });
+    }
+};