feat:E-Sign 필드 템플릿 테이블 마이그레이션 추가

- esign_field_templates: 필드 배치 템플릿 저장
- esign_field_template_items: 템플릿 내 개별 필드 정보

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

database/migrations/2026_02_12_140000_create_esign_field_templates_table.php

@@ -0,0 +1,30 @@
+<?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('esign_field_templates', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('tenant_id')->constrained()->onDelete('cascade')->comment('테넌트 ID');
+            $table->string('name', 100)->comment('템플릿 이름');
+            $table->text('description')->nullable()->comment('템플릿 설명');
+            $table->unsignedTinyInteger('signer_count')->default(2)->comment('서명자 수');
+            $table->boolean('is_active')->default(true)->comment('활성 여부');
+            $table->foreignId('created_by')->nullable()->constrained('users')->nullOnDelete()->comment('생성자 ID');
+            $table->timestamps();
+
+            $table->index('tenant_id', 'idx_esign_field_templates_tenant');
+            $table->index('is_active', 'idx_esign_field_templates_active');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('esign_field_templates');
+    }
+};

database/migrations/2026_02_12_140100_create_esign_field_template_items_table.php

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+<?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('esign_field_template_items', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('template_id')->constrained('esign_field_templates')->onDelete('cascade')->comment('템플릿 ID');
+            $table->unsignedTinyInteger('signer_order')->comment('서명자 순서 (1, 2, ...)');
+            $table->unsignedSmallInteger('page_number')->comment('페이지 번호');
+            $table->decimal('position_x', 8, 2)->comment('X 좌표 (%)');
+            $table->decimal('position_y', 8, 2)->comment('Y 좌표 (%)');
+            $table->decimal('width', 8, 2)->comment('너비 (%)');
+            $table->decimal('height', 8, 2)->comment('높이 (%)');
+            $table->enum('field_type', ['signature', 'stamp', 'text', 'date', 'checkbox'])->default('signature')->comment('필드 유형');
+            $table->string('field_label', 100)->nullable()->comment('필드 라벨');
+            $table->boolean('is_required')->default(true)->comment('필수 여부');
+            $table->unsignedSmallInteger('sort_order')->default(0)->comment('정렬 순서');
+            $table->timestamps();
+
+            $table->index('template_id', 'idx_esign_field_template_items_template');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('esign_field_template_items');
+    }
+};