Add ranked play user history model

app/Models/MatchmakingUserEloHistory.php

@@ -0,0 +1,51 @@
+<?php
+
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the GNU Affero General Public License v3.0.
+// See the LICENCE file in the repository root for full licence text.
+
+declare(strict_types=1);
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+/**
+ * @property int $id
+ * @property Multiplayer\Room $room
+ * @property int $room_id
+ * @property MatchmakingPool $pool
+ * @property int $pool_id
+ * @property User $user
+ * @property int $user_id
+ * @property User $opponent
+ * @property int $opponent_id
+ * @property string $result
+ * @property int $elo_before
+ * @property int $elo_after
+ * @property \Carbon\Carbon|null $created_at
+ * @property \Carbon\Carbon|null $updated_at
+ */
+class MatchmakingUserEloHistory extends Model
+{
+    protected $table = 'matchmaking_user_elo_history';
+
+    public function opponent(): BelongsTo
+    {
+        return $this->belongsTo(User::class, 'opponent_id');
+    }
+
+    public function pool(): BelongsTo
+    {
+        return $this->belongsTo(MatchmakingPool::class);
+    }
+
+    public function room(): BelongsTo
+    {
+        return $this->belongsTo(Multiplayer\Room::class, 'room_id');
+    }
+
+    public function user(): BelongsTo
+    {
+        return $this->belongsTo(User::class, 'user_id');
+    }
+}