Implementa reforcos orcamentais com aprovacao independente

app/Models/Budget.php

@@ -3,6 +3,7 @@
 namespace App\Models;
 
 use App\Models\Concerns\BelongsToTenant;
+use Brick\Math\BigDecimal;
 use Illuminate\Database\Eloquent\Model;
 
 /** @property int $id
@@ -16,6 +17,13 @@ class Budget extends Model
 
     protected $guarded = ['id'];
 
+    public function approvedTotalMinor(): int
+    {
+        $sum = BudgetReinforcement::query()->where('budget_id', $this->id)->where('status', 'approved')->sum('amount_minor');
+
+        return BigDecimal::of((string) $sum)->plus($this->amount_minor)->toInt();
+    }
+
     protected static function booted(): void
     {
         static::updating(function (Budget $budget) {

app/Models/BudgetReinforcement.php

@@ -0,0 +1,35 @@
+<?php
+
+namespace App\Models;
+
+use App\Models\Concerns\BelongsToTenant;
+use Illuminate\Database\Eloquent\Model;
+
+/** @property int $id
+ * @property int $tenant_id
+ * @property int $budget_id
+ * @property int $created_by
+ * @property int $amount_minor
+ * @property string $status
+ * @property string $payload_hash
+ */
+class BudgetReinforcement extends Model
+{
+    use BelongsToTenant;
+
+    protected $guarded = ['id'];
+
+    protected $attributes = ['status' => 'pending'];
+
+    protected $hidden = ['payload_hash'];
+
+    protected static function booted(): void
+    {
+        static::updating(function (BudgetReinforcement $reinforcement) {
+            if ($reinforcement->getRawOriginal('status') !== 'pending' || array_diff(array_keys($reinforcement->getDirty()), ['status', 'reviewed_by', 'review_reason', 'reviewed_at', 'updated_at']) !== []) {
+                throw new \LogicException('Preservar o reforço e a decisão.');
+            }
+        });
+        static::deleting(fn () => throw new \LogicException('Não eliminar reforços orçamentais.'));
+    }
+}