One Post model for every visibility, read from notes the way peers write them

Post gains what federation and the Mastodon API need: Visibility (Public,
Unlisted, FollowersOnly, Direct, Circle, LocalGeo), the author's account
id, to/cc, the Create's id, url, context, quote, InReplyToURI and the
parent's author, a separate SpoilerText next to the title, language,
mentions, hashtags, remote attachments (alt text, blurhash, focus, size),
reply/favourite/reblog counters, revisions, EditedAt and DeletedAt.

Direct messages are Posts with Visibility Direct and a ConversationId;
migration _005 copies DmPost rows across with their ids and fills the new
fields of existing posts. DmPost is left in place so a rollback still sees
the old messages.

Inbound:
- NoteParser reads Note, Article, Page, Question and media types: content,
  then contentMap, then _misskey_content; summary as the spoiler and name
  as the title; Mention and Hashtag tags; attachments; a PeerTube-style
  list attribution prefers the person over the channel; quote URIs.
- Addressing classifies like Mastodon, finding followers-only by the
  author's own followers URL (now stored on ForeignAvatar), not by a
  "/followers" suffix.
- Create keeps a post when a local persona is addressed or mentioned, when
  it replies to a local post (the parent's reply count goes up) or when a
  community it follows is addressed; an unsolicited public post is not
  stored. Update keeps the previous version as a revision.

The outbox and object endpoints serve only Public and Unlisted posts.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012CzABvBkbcFqoHdmi8b9WB

PrivaPub/Federation/Controllers/PeasantsController.cs

@@ -4,6 +4,7 @@ using Microsoft.AspNetCore.RateLimiting;
 using MongoDB.Entities;
 
 using PrivaPub.Models.Federation;
+using PrivaPub.Models.Post;
 using PrivaPub.StaticServices;
 
 using System.Text.Json.Nodes;
@@ -51,12 +52,12 @@ namespace PrivaPub.Federation.Controllers
 				return NotFound();
 
 			var total = local.Kind == LocalActorKind.Group
-				? await DB.Default.CountAsync<PostEntity>(p => p.GroupId == local.Id && !p.IsLocalOnly, token)
-				: await DB.Default.CountAsync<PostEntity>(p => p.GroupUserId == local.Id && !p.IsFederatedCopy && !p.IsLocalOnly, token);
+				? await DB.Default.CountAsync<PostEntity>(p => p.GroupId == local.Id && (p.Visibility == PostVisibility.Public || p.Visibility == PostVisibility.Unlisted), token)
+				: await DB.Default.CountAsync<PostEntity>(p => p.GroupUserId == local.Id && !p.IsFederatedCopy && (p.Visibility == PostVisibility.Public || p.Visibility == PostVisibility.Unlisted), token);
 
 			var latest = await (local.Kind == LocalActorKind.Group
-					? _dbEntities.Posts.Match(p => p.GroupId == local.Id && !p.IsLocalOnly)
-					: _dbEntities.Posts.Match(p => p.GroupUserId == local.Id && !p.IsFederatedCopy && !p.IsLocalOnly))
+					? _dbEntities.Posts.Match(p => p.GroupId == local.Id && (p.Visibility == PostVisibility.Public || p.Visibility == PostVisibility.Unlisted))
+					: _dbEntities.Posts.Match(p => p.GroupUserId == local.Id && !p.IsFederatedCopy && (p.Visibility == PostVisibility.Public || p.Visibility == PostVisibility.Unlisted)))
 				.Sort(p => p.CreationDate, Order.Descending)
 				.Limit(OutboxSize)
 				.ExecuteAsync(token);
@@ -70,7 +71,7 @@ namespace PrivaPub.Federation.Controllers
 					continue;
 				}
 				var group = string.IsNullOrEmpty(post.GroupId) ? default : await _localActors.FindById(LocalActorKind.Group, post.GroupId, token);
-				var note = ActivityPubRenderer.Note(post, local, group, default);
+				var note = ActivityPubRenderer.Note(post, local, group, post.InReplyToURI);
 				items.Add(ActivityPubRenderer.Create(local, note, $"create-{post.ID}"));
 			}
 
@@ -103,14 +104,13 @@ namespace PrivaPub.Federation.Controllers
 				return NotFound();
 
 			var post = await _dbEntities.Posts
-				.Match(p => p.ID == postId && p.GroupUserId == local.Id && !p.IsFederatedCopy && !p.IsLocalOnly)
+				.Match(p => p.ID == postId && p.GroupUserId == local.Id && !p.IsFederatedCopy && (p.Visibility == PostVisibility.Public || p.Visibility == PostVisibility.Unlisted))
 				.ExecuteFirstAsync(token);
 			if (post == default)
 				return NotFound();
 
 			var group = string.IsNullOrEmpty(post.GroupId) ? default : await _localActors.FindById(LocalActorKind.Group, post.GroupId, token);
-			var replyTo = await ReplyTarget(post.AnsweringToPostId, token);
-			var note = ActivityPubRenderer.Note(post, local, group, replyTo);
+			var note = ActivityPubRenderer.Note(post, local, group, post.InReplyToURI);
 			note["@context"] = ActivityPubRenderer.ActivityStreams;
 			return Activity(note);
 		}
@@ -132,15 +132,6 @@ namespace PrivaPub.Federation.Controllers
 		public async Task<IActionResult> SharedInbox(CancellationToken token) =>
 			Answer(await _inbox.Receive(Request, default, token));
 
-		async Task<string> ReplyTarget(string answeringToPostId, CancellationToken token)
-		{
-			if (string.IsNullOrEmpty(answeringToPostId))
-				return default;
-			if (answeringToPostId.StartsWith("https://", StringComparison.OrdinalIgnoreCase))
-				return answeringToPostId;
-			return (await _dbEntities.Posts.MatchID(answeringToPostId).ExecuteFirstAsync(token))?.ObjectURI;
-		}
-
 		IActionResult Answer(InboxResult result)
 		{
 			if (result.Error != default)