Commit workspace changes

app/Models/GroupChallengeArtwork.php

@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class GroupChallengeArtwork extends Model
+{
+    use HasFactory;
+
+    protected $fillable = [
+        'group_challenge_id',
+        'artwork_id',
+        'submitted_by_user_id',
+        'sort_order',
+    ];
+
+    public function challenge(): BelongsTo
+    {
+        return $this->belongsTo(GroupChallenge::class, 'group_challenge_id');
+    }
+
+    public function artwork(): BelongsTo
+    {
+        return $this->belongsTo(Artwork::class);
+    }
+
+    public function submitter(): BelongsTo
+    {
+        return $this->belongsTo(User::class, 'submitted_by_user_id');
+    }
+}