feat(withdrawal): normalize IBAN format in withdrawal requests

- Added IbanNormalizer to validate and normalize IBAN numbers in RequestWithdrawalCommandHandler and UserWalletService.
- Implemented error handling for invalid IBAN formats, ensuring compliance with expected standards.
- Updated relevant methods to handle normalized IBANs for cash withdrawal requests.

src/CMSMicroservice.Application/Common/IbanNormalizer.cs

@@ -0,0 +1,34 @@
+using System.Text.RegularExpressions;
+
+namespace CMSMicroservice.Application.Common;
+
+/// <summary>
+/// نرمال‌سازی و اعتبارسنجی شماره شبا ایران (IR + 24 رقم).
+/// </summary>
+public static class IbanNormalizer
+{
+    private static readonly Regex IranianIbanRegex = new(@"^IR\d{24}$", RegexOptions.Compiled);
+
+    /// <summary>
+    /// فاصله و خط تیره را حذف می‌کند، به حروف بزرگ تبدیل می‌کند و یک پیشوند IR می‌گذارد.
+    /// در صورت نامعتبر بودن، null برمی‌گرداند.
+    /// </summary>
+    public static string? TryNormalize(string? iban)
+    {
+        if (string.IsNullOrWhiteSpace(iban))
+            return null;
+
+        var normalized = iban.Trim().ToUpperInvariant()
+            .Replace(" ", "", StringComparison.Ordinal)
+            .Replace("-", "", StringComparison.Ordinal);
+
+        if (normalized.StartsWith("IR", StringComparison.Ordinal))
+            normalized = normalized[2..];
+
+        normalized = "IR" + normalized;
+
+        return IranianIbanRegex.IsMatch(normalized) ? normalized : null;
+    }
+
+    public static bool IsValid(string? iban) => TryNormalize(iban) is not null;
+}