Fix sonar reliability issues

[c71n93]

Related to #2251

Check current reliability issues in recent sonar report

They should be fixed in this pull request (except for issues with removing static "ThreadLocal" variables). Check sonar report for test branch in my fork (exact copy of this branch with changes for running sonar in my local repo).

---

PR-Codex overview

This PR focuses on removing memory leaks by calling ThreadLocal#remove() on specific variables.

Detailed summary

• Updated PhDefault, PhTraced, Dataized classes to include @todo for memory leak prevention.
• Modified OnDefault to handle empty label().
• Updated DcsFake to use rand.nextInt(Integer.MAX_VALUE) instead of Math.abs(rand.nextInt()).
• Refactored test in PullMojoTest to use FakeMaven for better readability.

✨ Ask PR-Codex anything about this PR by commenting with /codex {your question}

[c71n93]

@yegor256 could you check this one, please?