feat: [rd] AI 견적 엔진 테이블 생성 + 모듈 카탈로그 시더

- ai_quotation_modules: SAM 모듈 카탈로그 (18개 모듈)
- ai_quotations: AI 견적 요청/결과
- ai_quotation_items: AI 추천 모듈 목록
- AiQuotationModuleSeeder: customer-pricing 기반 초기 데이터

database/migrations/2026_03_02_100000_create_ai_quotation_tables.php

@@ -0,0 +1,89 @@
+<?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
+    {
+        // SAM 모듈 카탈로그
+        Schema::create('ai_quotation_modules', function (Blueprint $table) {
+            $table->id();
+            $table->unsignedBigInteger('tenant_id');
+            $table->string('module_code', 50);
+            $table->string('module_name', 100);
+            $table->enum('category', ['basic', 'individual', 'addon']);
+            $table->text('description')->nullable();
+            $table->json('keywords')->nullable();
+            $table->decimal('dev_cost', 12, 0)->default(0);
+            $table->decimal('monthly_fee', 10, 0)->default(0);
+            $table->boolean('is_active')->default(true);
+            $table->integer('sort_order')->default(0);
+            $table->json('options')->nullable();
+            $table->timestamps();
+
+            $table->unique(['tenant_id', 'module_code'], 'uk_tenant_module');
+            $table->index('tenant_id');
+            $table->index('category');
+        });
+
+        // AI 견적 요청/결과
+        Schema::create('ai_quotations', function (Blueprint $table) {
+            $table->id();
+            $table->unsignedBigInteger('tenant_id');
+            $table->string('title', 200);
+            $table->enum('input_type', ['text', 'voice', 'document'])->default('text');
+            $table->longText('input_text')->nullable();
+            $table->string('input_file_path', 500)->nullable();
+            $table->string('ai_provider', 20)->default('gemini');
+            $table->string('ai_model', 50)->nullable();
+            $table->json('analysis_result')->nullable();
+            $table->json('quotation_result')->nullable();
+            $table->string('status', 20)->default('pending');
+            $table->unsignedBigInteger('linked_quote_id')->nullable();
+            $table->decimal('total_dev_cost', 12, 0)->default(0);
+            $table->decimal('total_monthly_fee', 10, 0)->default(0);
+            $table->unsignedBigInteger('created_by')->nullable();
+            $table->json('options')->nullable();
+            $table->timestamps();
+            $table->softDeletes();
+
+            $table->index('tenant_id');
+            $table->index('status');
+            $table->index('created_by');
+        });
+
+        // AI 추천 모듈 목록
+        Schema::create('ai_quotation_items', function (Blueprint $table) {
+            $table->id();
+            $table->unsignedBigInteger('ai_quotation_id');
+            $table->unsignedBigInteger('module_id')->nullable();
+            $table->string('module_code', 50);
+            $table->string('module_name', 100);
+            $table->boolean('is_required')->default(false);
+            $table->text('reason')->nullable();
+            $table->decimal('dev_cost', 12, 0)->default(0);
+            $table->decimal('monthly_fee', 10, 0)->default(0);
+            $table->integer('sort_order')->default(0);
+            $table->json('options')->nullable();
+            $table->timestamps();
+
+            $table->foreign('ai_quotation_id')
+                ->references('id')
+                ->on('ai_quotations')
+                ->cascadeOnDelete();
+
+            $table->index('ai_quotation_id');
+            $table->index('module_id');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('ai_quotation_items');
+        Schema::dropIfExists('ai_quotations');
+        Schema::dropIfExists('ai_quotation_modules');
+    }
+};