fix: update metrics crate

[xDarksome]

Description

Updates metrics crate.

Additionally:

• re-exports metrics-exporter-prometheus to ensure correct version usage

How Has This Been Tested?

WCN

Due Diligence

• Breaking change
• Requires a documentation update
• Requires a e2e/integration test update

[Copilot]

Pull Request Overview

This PR updates the metrics crate from version 0.23 to 0.24 and adds re-export functionality for the metrics-exporter-prometheus crate to ensure version compatibility.

• Updates the metrics crate dependency from version 0.23 to 0.24
• Adds conditional re-export of metrics-exporter-prometheus as prometheus_exporter
• Introduces a new feature flag exporter_prometheus to control the prometheus exporter dependency

Reviewed Changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated no comments.

File	Description
crates/metrics/src/lib.rs	Adds conditional re-export of prometheus exporter module
crates/metrics/Cargo.toml	Updates metrics version and adds prometheus exporter as optional dependency
Cargo.toml	Adds new feature flag for prometheus exporter integration

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}