Add routine that caches account balances. Add it to the /flush routine as well.

database/migrations/2024_05_12_060551_create_account_balance_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
+    {
+        if (!Schema::hasTable('account_balances')) {
+            Schema::create('account_balances', function (Blueprint $table) {
+                $table->id();
+                $table->timestamps();
+                $table->integer('account_id', false, true);
+                $table->integer('transaction_currency_id', false, true);
+                $table->decimal('balance', 32, 12);
+                $table->foreign('account_id')->references('id')->on('accounts')->onDelete('cascade');
+                $table->foreign('transaction_currency_id')->references('id')->on('transaction_currencies')->onDelete('cascade');
+                $table->unique(['account_id','transaction_currency_id'],'unique_account_currency');
+            });
+        }
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('account_balances');
+    }
+};