|SUCCESS| net/mlx5: log Rx queue CQ number

[dpdklab at iol.unh.edu]

Test-Label: ai-code-review
Test-Status: SUCCESS
https://dpdk.org/patch/171822

_AI Code Review_

=== Patch Review: series.patch (via Claude) ===
Review date: 2026-10-21

# DPDK Patch Review

## Summary

This patch adds a debug log statement to print the Rx queue completion queue number (CQN) during port start in the mlx5 PMD.

## ERRORS

None identified.

## WARNINGS

**Line length:**
```c
DRV_LOG(DEBUG, "Port %u Rx queue %u cqn=%u", port_id, rxq->idx, rxq_data->cqn);
```
This line exceeds 100 characters (appears to be 88 characters, which is acceptable under the <=100 character guideline, so this is not flagged).

**Missing release notes:**
This is a user-visible enhancement (new debug logging that aids troubleshooting). While it's a minor addition, it arguably improves observability and debugging capability. However, given that:
- It's debug-level logging only (not visible by default)
- It's driver-internal diagnostics
- No API or behavior changes

This is borderline for requiring release notes. Per guidelines, documentation is required for "important changes" and "significant changes". Debug logging additions are typically not considered significant enough to require release notes.

**No finding flagged** - debug logging additions in drivers are generally not release-note-worthy.

## INFO

None.

Review-Result: CLEAN