feat: [pm] is_urgent 필드 마이그레이션 추가

- admin_pm_tasks, admin_pm_issues 테이블에 is_urgent boolean 필드 추가
- 작업/이슈 긴급 토글 기능 지원

database/migrations/2025_11_28_174039_add_is_urgent_to_pm_tables.php

@@ -0,0 +1,38 @@
+<?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
+    {
+        // 작업 테이블에 is_urgent 추가
+        Schema::table('admin_pm_tasks', function (Blueprint $table) {
+            $table->boolean('is_urgent')->default(false)->after('priority');
+        });
+
+        // 이슈 테이블에 is_urgent 추가
+        Schema::table('admin_pm_issues', function (Blueprint $table) {
+            $table->boolean('is_urgent')->default(false)->after('status');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('admin_pm_tasks', function (Blueprint $table) {
+            $table->dropColumn('is_urgent');
+        });
+
+        Schema::table('admin_pm_issues', function (Blueprint $table) {
+            $table->dropColumn('is_urgent');
+        });
+    }
+};