refactor: 검사 테이블 통합 및 출하 대시보드 수정

## 변경 사항

### 검사 시스템 통합
- 레거시 검사 모델 삭제 (MaterialInspection, MaterialInspectionItem, MaterialReceipt)
- 통합 검사 모델 추가 (Inspection.php) - IQC/PQC/FQC 지원
- 품목 입고 모델 추가 (ItemReceipt.php)
- PricingService에서 ItemReceipt 참조로 변경

### 출하 대시보드 수정
- ShipmentService stats() 프론트엔드 호환 필드 추가
  - today_shipment_count, scheduled_count, shipping_count, urgent_count

### 마이그레이션
- inspections 테이블 생성 (IQC/PQC/FQC 통합)
- item_receipts로 테이블명 변경

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

database/migrations/2025_12_29_175820_create_inspections_table_and_drop_legacy_material_tables.php

@@ -0,0 +1,116 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * 통합 검사 테이블 생성 및 레거시 테이블 정리
+     * - inspections: IQC/PQC/FQC 통합 관리
+     * - material_receipts → item_receipts 이름 변경
+     * - 삭제: material_inspections, material_inspection_items
+     */
+    public function up(): void
+    {
+        // 1. 통합 검사 테이블 생성
+        Schema::create('inspections', function (Blueprint $table) {
+            $table->id();
+            $table->unsignedBigInteger('tenant_id')->comment('테넌트 ID');
+
+            // 인덱스 컬럼 (검색/필터용)
+            $table->string('inspection_no', 30)->comment('검사번호');
+            $table->enum('inspection_type', ['IQC', 'PQC', 'FQC'])->comment('검사유형: IQC(수입검사), PQC(공정검사), FQC(최종검사)');
+            $table->enum('status', ['waiting', 'in_progress', 'completed'])->default('waiting')->comment('상태');
+            $table->enum('result', ['pass', 'fail'])->nullable()->comment('판정결과');
+            $table->date('request_date')->comment('검사요청일');
+            $table->date('inspection_date')->nullable()->comment('검사일');
+            $table->unsignedBigInteger('item_id')->nullable()->comment('품목 ID (items FK)');
+            $table->string('lot_no', 50)->comment('LOT번호');
+            $table->unsignedBigInteger('inspector_id')->nullable()->comment('검사자 ID (users FK)');
+
+            // JSON 컬럼 (비검색 데이터)
+            $table->json('meta')->nullable()->comment('메타정보: process_name, quantity, unit, supplier_name, manufacturer_name 등');
+            $table->json('items')->nullable()->comment('검사항목 배열: [{name, type, spec, unit, result, measured_value, judgment}]');
+            $table->json('attachments')->nullable()->comment('첨부파일: [{id, file_name, file_url, file_type, uploaded_at}]');
+            $table->json('extra')->nullable()->comment('추가정보: remarks, opinion, approver_name 등');
+
+            // 감사 컬럼
+            $table->unsignedBigInteger('created_by')->comment('생성자');
+            $table->unsignedBigInteger('updated_by')->nullable()->comment('수정자');
+            $table->unsignedBigInteger('deleted_by')->nullable()->comment('삭제자');
+            $table->timestamps();
+            $table->softDeletes();
+
+            // 인덱스
+            $table->unique(['tenant_id', 'inspection_no'], 'inspections_tenant_no_unique');
+            $table->index('tenant_id', 'inspections_tenant_idx');
+            $table->index('inspection_type', 'inspections_type_idx');
+            $table->index('status', 'inspections_status_idx');
+            $table->index('result', 'inspections_result_idx');
+            $table->index('request_date', 'inspections_request_date_idx');
+            $table->index('inspection_date', 'inspections_inspection_date_idx');
+            $table->index('item_id', 'inspections_item_idx');
+            $table->index('lot_no', 'inspections_lot_idx');
+            $table->index('inspector_id', 'inspections_inspector_idx');
+            $table->index(['tenant_id', 'inspection_type', 'status'], 'inspections_tenant_type_status_idx');
+        });
+
+        // 2. material_receipts → item_receipts 이름 변경
+        Schema::rename('material_receipts', 'item_receipts');
+
+        // 3. 레거시 검사 테이블 삭제
+        Schema::dropIfExists('material_inspection_items');
+        Schema::dropIfExists('material_inspections');
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        // 1. 통합 테이블 삭제
+        Schema::dropIfExists('inspections');
+
+        // 2. item_receipts → material_receipts 이름 복원
+        Schema::rename('item_receipts', 'material_receipts');
+
+        // 3. 레거시 검사 테이블 복원
+        Schema::create('material_inspections', function (Blueprint $table) {
+            $table->id();
+            $table->unsignedBigInteger('receipt_id');
+            $table->unsignedBigInteger('tenant_id');
+            $table->date('inspection_date');
+            $table->string('inspector_name', 50)->nullable();
+            $table->string('approver_name', 50)->nullable();
+            $table->string('judgment_code', 30);
+            $table->string('status_code', 30);
+            $table->text('result_file_path')->nullable();
+            $table->text('remarks')->nullable();
+            $table->unsignedBigInteger('created_by');
+            $table->unsignedBigInteger('updated_by')->nullable();
+            $table->timestamps();
+            $table->softDeletes();
+            $table->unsignedBigInteger('deleted_by')->nullable();
+
+            $table->index('receipt_id');
+        });
+
+        Schema::create('material_inspection_items', function (Blueprint $table) {
+            $table->id();
+            $table->unsignedBigInteger('inspection_id');
+            $table->string('item_name', 100);
+            $table->char('is_checked', 1)->default('N');
+            $table->unsignedBigInteger('created_by');
+            $table->unsignedBigInteger('updated_by')->nullable();
+            $table->timestamps();
+            $table->softDeletes();
+            $table->unsignedBigInteger('deleted_by')->nullable();
+
+            $table->index('inspection_id');
+        });
+    }
+};