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

app/Models/InvoiceAttachment.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Support\Facades\Storage;
+
+class InvoiceAttachment extends Model
+{
+    protected $table = 'invoice_attachments';
+
+    protected $guarded = [];
+
+    protected $appends = ['url'];
+
+    public function invoice()
+    {
+        return $this->belongsTo(Invoice::class);
+    }
+
+    public function getUrlAttribute(): string
+    {
+        return Storage::disk($this->disk)->url($this->path);
+    }
+}