fix(#3152): not mandatory comments on level more than 2

[maxonfjvipon]

Closes: #3152

---

PR-Codex overview

This PR enhances the codebase by refining comments and updating object properties in various .eo files. It also improves error handling in the Java code.

Detailed summary

• Updated comments for abstract objects in multiple .eo files.
• Revised object properties and method calls in .eo files.
• Enhanced error handling logic in Java code for comments validation.

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

[maxonfjvipon]

@yegor256 please check

[yegor256]

@rultor merge

[rultor]

@rultor merge

@yegor256 OK, I'll try to merge now. You can check the progress of the merge here

[rultor]

@rultor merge

@yegor256 Done! FYI, the full log is here (took me 17min)