fix(migrations): articles.description/keywords to text for sablog legacy data

database/migrations/2026_08_11_100000_create_blog_tables.php

@@ -23,8 +23,8 @@ return new class extends Migration
             $table->string('title');
             $table->longText('content');
             $table->string('content_format', 16)->default('html');
-            $table->string('description')->nullable();
-            $table->string('keywords')->nullable();
+            $table->text('description')->nullable();
+            $table->text('keywords')->nullable();
             $table->timestamp('published_at')->nullable();
             $table->unsignedBigInteger('views')->default(0);
             $table->unsignedInteger('comments_count')->default(0);