Add helpdesk import progress, category model, article metadata columns, and ticket pagination controls

app/Models/Article.php

@@ -4,11 +4,21 @@ namespace App\Models;
 
 use App\Casts\VectorCast;
 use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Database\Eloquent\Relations\HasMany;
 
 class Article extends Model
 {
-    protected $fillable = ['title', 'content', 'embedding'];
+    protected $fillable = [
+        'title',
+        'content',
+        'embedding',
+        'source',
+        'source_url',
+        'source_article_id',
+        'category_id',
+        'subcategory_id',
+    ];
 
     protected $casts = [
         'embedding' => VectorCast::class,
@@ -18,4 +28,14 @@ class Article extends Model
     {
         return $this->hasMany(AIDecision::class);
     }
+
+    public function category(): BelongsTo
+    {
+        return $this->belongsTo(Category::class, 'category_id');
+    }
+
+    public function subcategory(): BelongsTo
+    {
+        return $this->belongsTo(Category::class, 'subcategory_id');
+    }
 }