feat(API): 직책/직원/근태 관리 API 개선

- Position 모델: key 필드 추가 및 마이그레이션
- PositionSeeder: 기본 직책 시더 추가
- TenantUserProfile: 프로필 이미지 관련 필드 추가
- Employee Request: 직원 등록/수정 요청 검증 강화
- EmployeeService: 직원 관리 서비스 로직 개선
- AttendanceService: 근태 관리 서비스 개선

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

database/migrations/2025_12_30_131009_add_key_to_positions_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
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('positions', function (Blueprint $table) {
+            $table->string('key', 64)->nullable()->after('type')->comment('영문 키 (tenant_user_profiles 연동용)');
+            $table->unique(['tenant_id', 'type', 'key'], 'positions_tenant_type_key_unique');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('positions', function (Blueprint $table) {
+            $table->dropUnique('positions_tenant_type_key_unique');
+            $table->dropColumn('key');
+        });
+    }
+};

database/seeders/PositionSeeder.php

@@ -0,0 +1,76 @@
+<?php
+
+namespace Database\Seeders;
+
+use App\Models\Tenants\Position;
+use Illuminate\Database\Seeder;
+
+class PositionSeeder extends Seeder
+{
+    /**
+     * Run the database seeds.
+     * 직급(rank)과 직책(title) 기본 데이터 생성
+     */
+    public function run(): void
+    {
+        $tenantId = 287; // 프론트_테스트회사
+
+        // 직급 (rank) - 기존 tenant_user_profiles.position_key와 매핑
+        $ranks = [
+            ['key' => 'STAFF', 'name' => '사원', 'sort_order' => 1],
+            ['key' => 'SENIOR', 'name' => '주임', 'sort_order' => 2],
+            ['key' => 'ASSISTANT_MANAGER', 'name' => '대리', 'sort_order' => 3],
+            ['key' => 'MANAGER', 'name' => '과장', 'sort_order' => 4],
+            ['key' => 'DEPUTY_MANAGER', 'name' => '차장', 'sort_order' => 5],
+            ['key' => 'DIRECTOR', 'name' => '부장', 'sort_order' => 6],
+            ['key' => 'EXECUTIVE', 'name' => '이사', 'sort_order' => 7],
+            ['key' => 'SENIOR_EXECUTIVE', 'name' => '상무', 'sort_order' => 8],
+            ['key' => 'VICE_PRESIDENT', 'name' => '전무', 'sort_order' => 9],
+            ['key' => 'CEO', 'name' => '대표', 'sort_order' => 10],
+        ];
+
+        // 직책 (title)
+        $titles = [
+            ['key' => 'MEMBER', 'name' => '팀원', 'sort_order' => 1],
+            ['key' => 'PART_LEADER', 'name' => '파트장', 'sort_order' => 2],
+            ['key' => 'TEAM_LEADER', 'name' => '팀장', 'sort_order' => 3],
+            ['key' => 'DEPARTMENT_HEAD', 'name' => '실장', 'sort_order' => 4],
+            ['key' => 'DIVISION_HEAD', 'name' => '본부장', 'sort_order' => 5],
+            ['key' => 'CEO', 'name' => '대표이사', 'sort_order' => 6],
+        ];
+
+        // 직급 생성
+        foreach ($ranks as $rank) {
+            Position::updateOrCreate(
+                [
+                    'tenant_id' => $tenantId,
+                    'type' => 'rank',
+                    'key' => $rank['key'],
+                ],
+                [
+                    'name' => $rank['name'],
+                    'sort_order' => $rank['sort_order'],
+                    'is_active' => true,
+                ]
+            );
+        }
+
+        // 직책 생성
+        foreach ($titles as $title) {
+            Position::updateOrCreate(
+                [
+                    'tenant_id' => $tenantId,
+                    'type' => 'title',
+                    'key' => $title['key'],
+                ],
+                [
+                    'name' => $title['name'],
+                    'sort_order' => $title['sort_order'],
+                    'is_active' => true,
+                ]
+            );
+        }
+
+        $this->command->info('Positions seeded: ' . count($ranks) . ' ranks, ' . count($titles) . ' titles');
+    }
+}