feat: [pmis] 자재관리 테이블 마이그레이션 추가

database/migrations/2026_03_12_160000_create_pmis_materials_table.php

@@ -0,0 +1,34 @@
+<?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::create('pmis_materials', function (Blueprint $table) {
+            $table->id();
+            $table->unsignedBigInteger('tenant_id');
+            $table->string('company_name', 200);
+            $table->string('material_code', 50)->nullable();
+            $table->string('material_name', 200);
+            $table->string('specification', 300)->nullable();
+            $table->string('unit', 50)->nullable();
+            $table->decimal('design_quantity', 14, 2)->default(0)->comment('설계량');
+            $table->json('options')->nullable();
+            $table->timestamps();
+            $table->softDeletes();
+
+            $table->index('tenant_id');
+            $table->index(['tenant_id', 'company_name']);
+            $table->index(['tenant_id', 'material_name']);
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('pmis_materials');
+    }
+};