v2.4.1 — real-data fixes: SO answer links + Gitee issue ids
Two quality fixes found by running the v2.4.0 tools against real data:
- so_question_answers: StackExchange answers don't always include a link field → now falls back to a stable https://stackoverflow.com/a/{answerId} URL
- gitee_repo_issues: Gitee issues don't expose a numeric number → now surfaces the real issue ident (e.g. IK8TOP) from html_url
39/39 unit tests pass; released with the same CI verification (fresh profile install + dsh web boot).