Replies a post's author approves (FEP-5624), checked live with PeerTube

PeerTube puts canReply on a video whose comments wait for approval, and answers each comment with ApproveReply. A
persona's reply to such a post now waits (privapub.approval: pending), its Create going to the author alone; the
author's ApproveReply, signed by the author and naming the post answered, lets it out to its audience with
replyApproval, and RejectReply leaves it ours. A null canReply (PeerTube's open comments) says nothing; an empty one
refuses. The PeerTube scenario holds a comment for review and approves it through PeerTube's API (28 checks).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LsXgEaXee4GCU1hwYgPJXw

PrivaPub/Federation/Objects/NoteParser.cs

@@ -44,6 +44,7 @@ namespace PrivaPub.Federation.Objects
 		public InteractionRule ReplyPolicy { get; init; }
 		public InteractionRule LikePolicy { get; init; }
 		public InteractionRule AnnouncePolicy { get; init; }
+		public InteractionRule ReplyApprovals { get; init; }//FEP-5624's canReply: who may reply, each reply then approved or refused
 		public IReadOnlyList<CustomEmoji> Emojis { get; init; } = Array.Empty<CustomEmoji>();
 		public string CoverURL { get; init; }
 		public PostLink Link { get; init; }
@@ -122,6 +123,7 @@ namespace PrivaPub.Federation.Objects
 				ReplyPolicy = ObjectShapes.Policy(note, "canReply"),
 				LikePolicy = ObjectShapes.Policy(note, "canLike"),
 				AnnouncePolicy = ObjectShapes.Policy(note, "canAnnounce"),
+				ReplyApprovals = ObjectShapes.ReplyApprovals(note),
 				Emojis = ObjectShapes.Emojis(note["tag"]),
 				CoverURL = ObjectShapes.Cover(note),
 				Link = ObjectShapes.Link(note),