Expand IGDB data: collections, game modes, themes, perspectives, videos, websites, age ratings, similar games; add backfill command

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/Models/GameVideo.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class GameVideo extends Model
+{
+    protected $fillable = ['game_id', 'igdb_id', 'name', 'video_id'];
+
+    public function game(): BelongsTo
+    {
+        return $this->belongsTo(Game::class);
+    }
+
+    public function getYoutubeUrlAttribute(): string
+    {
+        return "https://www.youtube.com/watch?v={$this->video_id}";
+    }
+
+    public function getYoutubeEmbedUrlAttribute(): string
+    {
+        return "https://www.youtube.com/embed/{$this->video_id}";
+    }
+}