Add support for exp rank history

app/Models/Count.php

···
     protected $primaryKey = 'name';
     protected $table = 'osu_counts';
 
-    public static function currentRankStart(string $mode): static
+    public static function currentRankStart(string $ruleset): static
     {
-        return static::firstOrCreate(['name' => "pp_rank_column_{$mode}"], ['count' => 0]);
+        $column = config('osu.scores.experimental_rank_as_default')
+            ? "pp_rank_column_exp_{$ruleset}"
+            : "pp_rank_column_{$ruleset}";
+
+        return static::firstOrCreate(['name' => $column], ['count' => 0]);
     }
 
     public static function totalUsers(): static

app/Models/RankHistory.php

···
 
     public $timestamps = false;
 
+    public function __construct(array $attributes = [])
+    {
+        if (config('osu.scores.experimental_rank_as_default')) {
+            $this->table = 'osu_user_performance_rank_exp';
+        }
+
+        parent::__construct($attributes);
+    }
+
     public function getDataAttribute()
     {
         $data = [];

database/migrations/2022_12_12_052806_create_user_performance_rank_exp.php

···
+<?php
+
+// Copyright (c) ppy Pty Ltd <[e-mail]>. 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);
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('osu_user_performance_rank_exp', function (Blueprint $table) {
+            $table->integer('user_id')->unsigned();
+            $table->boolean('mode');
+            for ($i = 0; $i < 90; $i++) {
+                $table->integer("r{$i}")->default(0);
+            }
+            $table->primary(['user_id', 'mode']);
+        });
+
+        $partitions = 'PARTITION p0 VALUES LESS THAN (1),';
+        $partitions .= 'PARTITION p1 VALUES LESS THAN (2),';
+        $partitions .= 'PARTITION p2 VALUES LESS THAN (3),';
+        $partitions .= 'PARTITION p3 VALUES LESS THAN (4)';
+        DB::statement("ALTER TABLE `osu_user_performance_rank_exp` PARTITION BY RANGE (mode) ({$partitions});");
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('osu_user_performance_rank_exp');
+    }
+};