Fix: Use revision meta author in topic/reply revision logs

[rollybueno]

Summary

This PR fixes an issue where bbp_get_reply_revision_log() and bbp_get_topic_revision_log() would always display the original revision author, even if a different author was set in the revision log meta.

Details

• The functions now check for an author value in the revision log meta for each revision.
• If present, the log displays the name and link for the meta author; otherwise, it falls back to the original revision's post_author.
• This allows filters (such as on bbp_get_reply_raw_revision_log) to override the displayed author for moderation or other purposes.

References

• bbPress Trac #3579