feat:홈택스 세금계산서 로컬 저장 테이블 추가

- hometax_invoices 테이블 생성 마이그레이션
- 국세청승인번호 기준 중복 방지 인덱스
- 매출/매입 구분, 금액정보, 거래처정보 저장
- 메모/분류/확인여부 등 자체 관리 필드

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

LOGICAL_RELATIONSHIPS.md

@@ -1,6 +1,6 @@
 # 논리적 데이터베이스 관계 문서
 
-> **자동 생성**: 2026-01-30 19:54:12
+> **자동 생성**: 2026-02-03 17:09:34
 > **소스**: Eloquent 모델 관계 분석
 
 ## 📊 모델별 관계 현황
@@ -197,6 +197,7 @@ ### model_versions
 ### documents
 **모델**: `App\Models\Documents\Document`
 
+- **template()**: belongsTo → `document_templates`
 - **creator()**: belongsTo → `users`
 - **updater()**: belongsTo → `users`
 - **approvals()**: hasMany → `document_approvals`
@@ -223,6 +224,40 @@ ### document_datas
 
 - **document()**: belongsTo → `documents`
 
+### document_templates
+**모델**: `App\Models\Documents\DocumentTemplate`
+
+- **approvalLines()**: hasMany → `document_template_approval_lines`
+- **basicFields()**: hasMany → `document_template_basic_fields`
+- **sections()**: hasMany → `document_template_sections`
+- **columns()**: hasMany → `document_template_columns`
+
+### document_template_approval_lines
+**모델**: `App\Models\Documents\DocumentTemplateApprovalLine`
+
+- **template()**: belongsTo → `document_templates`
+
+### document_template_basic_fields
+**모델**: `App\Models\Documents\DocumentTemplateBasicField`
+
+- **template()**: belongsTo → `document_templates`
+
+### document_template_columns
+**모델**: `App\Models\Documents\DocumentTemplateColumn`
+
+- **template()**: belongsTo → `document_templates`
+
+### document_template_sections
+**모델**: `App\Models\Documents\DocumentTemplateSection`
+
+- **template()**: belongsTo → `document_templates`
+- **items()**: hasMany → `document_template_section_items`
+
+### document_template_section_items
+**모델**: `App\Models\Documents\DocumentTemplateSectionItem`
+
+- **section()**: belongsTo → `document_template_sections`
+
 ### estimates
 **모델**: `App\Models\Estimate\Estimate`
 

database/migrations/2026_02_03_170916_create_hometax_invoices_table.php

@@ -0,0 +1,77 @@
+<?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('hometax_invoices', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('tenant_id')->constrained()->cascadeOnDelete();
+
+            // 고유 식별자 (중복 방지)
+            $table->string('nts_confirm_num', 50)->comment('국세청승인번호');
+            $table->enum('invoice_type', ['sales', 'purchase'])->comment('매출/매입');
+
+            // 일자 정보
+            $table->date('write_date')->comment('작성일자');
+            $table->date('issue_date')->nullable()->comment('발급일자');
+            $table->date('send_date')->nullable()->comment('전송일자');
+
+            // 공급자 정보
+            $table->string('invoicer_corp_num', 20)->comment('공급자 사업자번호');
+            $table->string('invoicer_corp_name', 100)->comment('공급자 상호');
+            $table->string('invoicer_ceo_name', 50)->nullable()->comment('공급자 대표자');
+
+            // 공급받는자 정보
+            $table->string('invoicee_corp_num', 20)->comment('공급받는자 사업자번호');
+            $table->string('invoicee_corp_name', 100)->comment('공급받는자 상호');
+            $table->string('invoicee_ceo_name', 50)->nullable()->comment('공급받는자 대표자');
+
+            // 금액 정보
+            $table->bigInteger('supply_amount')->default(0)->comment('공급가액');
+            $table->bigInteger('tax_amount')->default(0)->comment('세액');
+            $table->bigInteger('total_amount')->default(0)->comment('합계');
+
+            // 구분 정보
+            $table->tinyInteger('tax_type')->default(1)->comment('과세유형 1:과세 2:영세 3:면세');
+            $table->tinyInteger('purpose_type')->default(1)->comment('영수/청구 1:영수 2:청구');
+            $table->tinyInteger('issue_type')->default(1)->comment('발급유형 1:정발행 2:역발행');
+
+            // 기타
+            $table->string('item_name', 200)->nullable()->comment('품목명');
+            $table->string('remark', 500)->nullable()->comment('비고');
+
+            // 자체 관리 필드
+            $table->string('memo', 500)->nullable()->comment('내부 메모');
+            $table->string('category', 50)->nullable()->comment('분류 태그');
+            $table->boolean('is_checked')->default(false)->comment('확인 여부');
+
+            // 동기화 정보
+            $table->timestamp('synced_at')->nullable()->comment('마지막 동기화 시간');
+
+            $table->timestamps();
+            $table->softDeletes();
+
+            // 인덱스
+            $table->unique(['tenant_id', 'nts_confirm_num', 'invoice_type'], 'hometax_invoices_unique');
+            $table->index(['tenant_id', 'invoice_type', 'write_date'], 'hometax_invoices_type_date');
+            $table->index(['tenant_id', 'invoicer_corp_num'], 'hometax_invoices_invoicer');
+            $table->index(['tenant_id', 'invoicee_corp_num'], 'hometax_invoices_invoicee');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('hometax_invoices');
+    }
+};