Add constructor to BadRequestException for inner exceptions

Added a new constructor to BadRequestException that accepts both a message and an inner exception, enabling improved exception chaining and more detailed error reporting.

DigitalData.Core.Exceptions/BadRequestException.cs

@@ -19,4 +19,13 @@ public class BadRequestException : Exception
     public BadRequestException(string? message) : base(message)
     {
     }
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="BadRequestException"/> class with a specified error message and inner exception.
+    /// </summary>
+    /// <param name="message">The message that describes the error.</param>
+    /// <param name="innerException">The exception that caused the current exception.</param>
+    public BadRequestException(string? message, Exception? innerException) : base(message, innerException)
+    {
+    }
 }