HeaderStrategy Requirement

[sercanbektas]

I encountered an issue in one of my projects related to the HeaderStrategy class. When making a request from the Flutter side with a tenant header, the HeaderStrategy class couldn't retrieve the tenant information due to a specific code block. To resolve this, I made a modification to the code block as follows:

I extended the class and made the necessary adjustments, which resolved the issue. If you'd like, I can create a pull request for these changes.

    var targetContext = context as HttpContext;
    if (targetContext == null)
    {
        throw new MultiTenantException(null,
            new ArgumentException($"\"{nameof(context)}\" type must be of type HttpContext", nameof(context)));
    }

    return Task.FromResult(targetContext.Request.Headers[_headerKey].FirstOrDefault());

Some of the requests context should be DefaultHttpContext and controlling with is not working