fix: code quality and safety improvements

[saurabhhhcodes]

No description provided.

[github-actions]

GSSoC Label Checklist 🏷️

@Priyanshu-byte-coder — please apply the appropriate labels before merging:

Difficulty (pick one):

• level:beginner — 20 pts
• level:intermediate — 35 pts
• level:advanced — 55 pts
• level:critical — 80 pts

Quality (optional):

• quality:clean — ×1.2 multiplier
• quality:exceptional — ×1.5 multiplier

Validation (required to score):

• gssoc:approved — counts for points
• gssoc:invalid / gssoc:spam / gssoc:ai-slop — does not score

Type labels (type:*) are auto-detected from files and title. Review and adjust if needed.
Points formula: (difficulty × quality_multiplier) + type_bonus

[Priyanshu-byte-coder]

Closing — this change is incorrect and would introduce a bug.

- return Array.from(reposSet).sort();
+ return Array.from(reposSet).sort((a, b) => a - b);

reposSet, langsSet and events all hold strings. (a, b) => a - b is a numeric comparator — subtracting two strings yields NaN, so the comparator always returns NaN and the sort order becomes unspecified. The default .sort() (lexicographic) is the correct behavior for strings.

This matters beyond ordering: eventsKey = [...events].sort().join(",") is used as a cache key, so a non-deterministic sort would break cache stability.

Also note #3299 and #3300 are identical to each other — please don't open the same change twice.