feat(middleware): log content_length for 4xx

[Narayanbhat166]

Type of Change

• [x] Enhancement

Description

In case of 4xx, we need to log the content length of the request from the content-length header. This PR adds that enhancement.

Motivation and Context

To provide better support for debugging issues related to missing fields.

How did you test it?

• Create a 4xx error and check for the content length log.

Checklist

• [x] I formatted the code cargo +nightly fmt --all
• [x] I addressed lints thrown by cargo clippy
• [x] I reviewed the submitted code