feat: 租戶建立自動產生預設網域與管理員帳號

- 修改 TenantController 自動產生預設網域 ({tenant_id}.{TENANT_DEFAULT_DOMAIN})
- 新增 TenantDatabaseSeeder 自動建立 admin 帳號
- 啟用 SeedDatabase Job 在建立租戶時自動執行 seeder
- 新增 TENANT_DEFAULT_DOMAIN 環境變數支援不同環境
- 補充中央資料庫所需的 migrations

database/migrations/0001_01_01_000001_create_cache_table.php

@@ -0,0 +1,35 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('cache', function (Blueprint $table) {
+            $table->string('key')->primary();
+            $table->mediumText('value');
+            $table->integer('expiration');
+        });
+
+        Schema::create('cache_locks', function (Blueprint $table) {
+            $table->string('key')->primary();
+            $table->string('owner');
+            $table->integer('expiration');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('cache');
+        Schema::dropIfExists('cache_locks');
+    }
+};