T10: what GoToSocial had not yet been asked, and quick edits that were lost

The GoToSocial scenario gains 17 checks:
- alice's reply threads under gtsuser's post;
- gtsuser's edit arrives with edited_at and two history entries;
- unlike and unboost both ways;
- images with alt text both ways, theirs through our proxy;
- gtsuser follows a PrivaPub community and its announce brings the post;
- gtsuser's request to join a circle waits for the owner and is approved, and the
  circle post is never served unsigned;
- a locked persona holds gtsuser's follow, rejects it, then authorizes it;
- the deploy's Mastodon smoke check passes, signed in.

54 checks passed, three runs in a row. The circle post reaching gtsuser is an expected
failure: GoToSocial keeps no post addressed only to a collection it does not know.

It found a bug. An edit made within the second the post was published carries GoToSocial's
whole-second updated == published, and IsEdit wanted strictly newer, so the edit was taken
as a refresh and lost. A first edit now also counts when it is no older and the text,
warning or title actually changed. A bare refresh still never makes a revision.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01ELjqpznMFMNrJoJUj6K5p2

PrivaPub/Federation/Inbox/RemoteEdits.cs

@@ -15,8 +15,15 @@ namespace PrivaPub.Federation.Inbox
 	{
 		public const int MaxRevisions = 20;
 
+		//newer than what we hold; or, for a first edit, no older and actually different, because GoToSocial's timestamps are
+		//whole seconds and an edit made in the second the post was published carries updated == published
 		public static bool IsEdit(NoteDocument note, PostEntity post) =>
-			note.Updated is { } updated && updated > (post.EditedAt ?? post.CreationDate);
+			note.Updated is { } updated
+			&& (updated > (post.EditedAt ?? post.CreationDate)
+				|| post.EditedAt == default && updated >= post.CreationDate && Changed(note, post));
+
+		static bool Changed(NoteDocument note, PostEntity post) =>
+			note.ContentHtml != post.ContentHtml || note.SpoilerText != post.SpoilerText || note.Title != post.Title || note.Sensitive != post.HasContentWarning;
 
 		public static async Task<bool> Apply(PostEntity post, NoteDocument note, string activityId, ILocalActorService localActors, IObjectRecords records,
 			IQuoteService quotes, CancellationToken token)