feat: Implement client status validation on login, refine password rules, and simplify customer resource status.

app/Models/Invoice.php

@@ -34,6 +34,11 @@ class Invoice extends Model
         return $this->belongsTo(\App\Models\Order::class, 'id', 'invoice_id');
     }
 
+    public function attachments()
+    {
+        return $this->hasMany(\App\Models\InvoiceAttachment::class);
+    }
+
     public function getStatus()
     {
         return match ($this->attributes['status']) {