feat: quotes 테이블에 options JSON 컬럼 추가

- 견적요약, 공과상세, 품목 단가조정 데이터를 JSON으로 저장
- Quote 모델에 options 필드 추가 (fillable, casts)
- 중요도가 낮은 필드는 개별 테이블 대신 JSON으로 관리

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

database/migrations/2026_01_14_120218_add_options_to_quotes_table.php

@@ -0,0 +1,29 @@
+<?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('quotes', function (Blueprint $table) {
+            $table->json('options')->nullable()->after('calculation_inputs')
+                ->comment('견적 옵션 데이터 (summary_items, expense_items, price_adjustments)');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('quotes', function (Blueprint $table) {
+            $table->dropColumn('options');
+        });
+    }
+};