feat: [hr] 사업소득자관리 worker_type 컬럼 추가

- tenant_user_profiles 테이블에 worker_type 컬럼 추가 (employee/business_income)
- TenantUserProfile 모델 fillable에 worker_type 추가

app/Models/Tenants/TenantUserProfile.php

@@ -44,6 +44,7 @@ class TenantUserProfile extends Model
         'employee_status',
         'manager_user_id',
         'json_extra',
+        'worker_type',
         'profile_photo_path',
         'display_name',
     ];

database/migrations/2026_02_27_000000_add_worker_type_to_tenant_user_profiles_table.php

@@ -0,0 +1,25 @@
+<?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::table('tenant_user_profiles', function (Blueprint $table) {
+            $table->string('worker_type', 20)->default('employee')->after('employee_status')
+                ->comment('근로자유형: employee(사원), business_income(사업소득자)');
+            $table->index(['tenant_id', 'worker_type'], 'idx_tenant_worker_type');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('tenant_user_profiles', function (Blueprint $table) {
+            $table->dropIndex('idx_tenant_worker_type');
+            $table->dropColumn('worker_type');
+        });
+    }
+};