Posts a new comment if eligible candidates are empty

[h1alexbel]

closes #50

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PR-Codex overview

This PR focuses on updating the license year to 2024 and adding a new feature to post a comment when no candidates are found for an issue.

Detailed summary

• Updated the license year to 2024 in testing.yml
• Added a new feature to post a comment when no candidates are found for an issue in AssignOnIssueTest
• Added new classes Architect and FirstWithRole for handling performers with specific roles

The following files were skipped due to too many changes: src/test/java/git/tracehub/facts/FirstWithRoleTest.java

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[codecov[bot]]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (81e3d68) 81.35% compared to head (9fc0f04) 82.13%. Report is 16 commits behind head on master.

Files	Patch %	Lines
src/main/java/git/tracehub/facts/Architect.java	77.77%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #108 +/- ## ============================================ + Coverage 81.35% 82.13% +0.77% - Complexity 104 113 +9 ============================================ Files 35 37 +2 Lines 354 375 +21 Branches 19 19 ============================================ + Hits 288 308 +20 - Misses 59 61 +2 + Partials 7 6 -1 ```

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[h1alexbel]

@rultor merge