Add authorization header handling in proxy middleware

[v1k45]

Problem

When a proxy target URL contains User credentials, proxy middleware does not send request with the authorization header. This can lead to UnAuthorized Error (401) when connecting to upstream server.

Solution

• Implemented logic to pass the Authorization header to the target if the proxy URL includes user credentials.
• Added unit tests to verify behavior for both scenarios: with and without user credentials in the proxy URL.