Fix: Include initial response in resolve_redirects iterable (#1953)Fix redirect iterable

[Satvi27-debug]

This Pull Request addresses feature request #1953 by modifying the resolve_redirects generator in sessions.py.

Currently, the iterable produced by Session.resolve_redirects excludes the very first response that triggered the redirect chain. I have added a yield resp statement before the history tracking loop begins.

This change allows developers to process the entire redirect sequence—including the origin response—within a single for loop, eliminating the need for duplicate logic. The implementation includes a check for yield_requests to ensure backward compatibility and correct behavior when walking requests instead of responses.