fix: flaky Kademlia test

[hanabi1224]

Summary of changes

Changes introduced in this pull request:

• fix a bug that full_peers metric was only updated when a remote peer gets disconnected.
• update test node setup to also listen on quic-v1 protocol

Reference issue to close (if applicable)

Closes

Other information and links

Change checklist

• I have performed a self-review of my own code,
• I have made corresponding changes to the documentation. All new code adheres to the team's documentation standards,
• I have added tests that prove my fix is effective or that my feature works (if possible),
• I have made sure the CHANGELOG is up-to-date. All user-facing changes should be reflected in this document.

Outside contributions

• I have read and agree to the CONTRIBUTING document.
• I have read and agree to the AI Policy document. I understand that failure to comply with the guidelines will lead to rejection of the pull request.

Summary by CodeRabbit

Release Notes

• Tests

  • Updated test suite to support both TCP and UDP/QUIC network protocols for comprehensive protocol coverage.
  • Enhanced stateless node test configurations with expanded network endpoint support.

• Chores

  • Refined peer metrics collection for improved monitoring.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro

Run ID: 1b1ce70b-066b-4d5b-98ea-88220d7017b6

📥 Commits

Reviewing files that changed from the base of the PR and between 420a5ab and e42378d.

📒 Files selected for processing (4)

• scripts/tests/calibnet_kademlia_check.sh
• scripts/tests/calibnet_stateless_mode_check.sh
• scripts/tests/harness.sh
• src/libp2p/peer_manager.rs

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Walkthrough

This PR adds UDP/QUIC endpoint support to Forest test node configurations across three shell scripts and improves metrics instrumentation in the peer manager by explicitly updating the full-peer gauge during success and failure logging operations.

Changes

Network Configuration – UDP/QUIC Support

Layer / File(s)	Summary
Peer ID Extraction scripts/tests/calibnet_stateless_mode_check.sh	STATELESS_NODE_PEER_ID extraction changes from fixed field index to extracting the last path segment via rev/cut operations.
Network Listening Endpoints scripts/tests/calibnet_kademlia_check.sh, scripts/tests/calibnet_stateless_mode_check.sh, scripts/tests/harness.sh	Generated Forest node configurations now include both TCP and UDP/QUIC-v1 listening multiaddrs instead of TCP-only (e.g., ["/ip4/127.0.0.1/tcp/0", "/ip4/127.0.0.1/udp/0/quic-v1"]).

Peer Manager Metrics

Layer / File(s)	Summary
Metrics Instrumentation src/libp2p/peer_manager.rs	log_success and log_failure methods now explicitly update the metrics::FULL_PEERS gauge after mutating the full-peers list; remove_peer uses explicit as i64 cast for consistency.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Suggested reviewers

• LesnyRumcajs
• akaladarshi

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The pull request title 'fix: flaky Kademlia test' directly corresponds to the primary objectives, which focus on fixing a bug affecting the Kademlia test's reliability by correcting the full_peers metric update behavior and updating test node protocol configuration.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch hm/flaky-kad-test

✨ Simplify code

• Create PR with simplified code
• Commit simplified code in branch hm/flaky-kad-test

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[codecov]

Codecov Report

❌ Patch coverage is 33.33333% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 64.10%. Comparing base (420a5ab) to head (e42378d).
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
src/libp2p/peer_manager.rs	33.33%	2 Missing ⚠️

Additional details and impacted files

Files with missing lines	Coverage Δ
src/libp2p/peer_manager.rs	22.70% <33.33%> (-0.23%)	⬇️

... and 5 files with indirect coverage changes

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