feat(construction): 구조검토관리 API 구현

- Migration: structure_reviews 테이블 생성
- Model: StructureReview (BelongsToTenant, SoftDeletes)
- Service: StructureReviewService (CRUD + 통계 + 일괄삭제)
- Controller: StructureReviewController (7 endpoints)
- FormRequest: Store/Update 검증 규칙

API Endpoints:
- GET    /construction/structure-reviews (목록)
- POST   /construction/structure-reviews (생성)
- GET    /construction/structure-reviews/stats (통계)
- DELETE /construction/structure-reviews/bulk (일괄삭제)
- GET    /construction/structure-reviews/{id} (상세)
- PUT    /construction/structure-reviews/{id} (수정)
- DELETE /construction/structure-reviews/{id} (삭제)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

database/migrations/2026_01_09_100000_create_structure_reviews_table.php

@@ -0,0 +1,54 @@
+<?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::create('structure_reviews', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('tenant_id')->comment('테넌트 ID');
+            $table->string('review_number', 50)->nullable()->comment('검토번호');
+            $table->foreignId('partner_id')->nullable()->comment('거래처 ID');
+            $table->string('partner_name', 100)->nullable()->comment('거래처명');
+            $table->foreignId('site_id')->nullable()->comment('현장 ID');
+            $table->string('site_name', 200)->nullable()->comment('현장명');
+            $table->date('request_date')->nullable()->comment('구조검토 의뢰일');
+            $table->string('review_company', 100)->nullable()->comment('구조검토 회사');
+            $table->string('reviewer_name', 50)->nullable()->comment('구조검토자');
+            $table->date('review_date')->nullable()->comment('구조검토일');
+            $table->date('completion_date')->nullable()->comment('구조검토 완료일');
+            $table->string('status', 20)->default('pending')->comment('상태: pending, completed');
+            $table->string('file_url', 500)->nullable()->comment('구조검토 파일 URL');
+            $table->text('remarks')->nullable()->comment('비고');
+            $table->boolean('is_active')->default(true)->comment('활성화 여부');
+            $table->foreignId('created_by')->nullable()->comment('생성자 ID');
+            $table->foreignId('updated_by')->nullable()->comment('수정자 ID');
+            $table->foreignId('deleted_by')->nullable()->comment('삭제자 ID');
+            $table->timestamps();
+            $table->softDeletes();
+
+            // 인덱스
+            $table->index('tenant_id');
+            $table->index('partner_id');
+            $table->index('site_id');
+            $table->index('status');
+            $table->index('request_date');
+            $table->index('created_at');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('structure_reviews');
+    }
+};