One StatusService behind both client APIs, with outbound likes and boosts

Domain/Statuses/StatusService takes a persona, not a root, and is what
/clientapi and the Mastodon API share:
- Publish renders Markdown (clientapi) or plain text (Mastodon clients),
  checks the persona may see the post it replies to, opens or reuses the
  conversation for a direct post from its recipients and mentions, fans
  out and hands the Create to the outbox;
- Edit keeps a revision and sends Update{Note}; Remove soft-deletes and
  returns the post, so a client can delete and redraft;
- Favourite and Reblog work on anything the persona can see and send Like,
  Announce and their Undo to the author (and, for boosts, to followers);
  boosts are refused for anything but public and unlisted posts.

PostsService is now the clientapi wrapper that checks the root owns the
persona. A persona's own boost is a local row: the outbox renders it as
Announce, /grunts/announce-{id} resolves, and object endpoints, profile
pages and NodeInfo skip it. ContentFormat gains Plain.

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

PrivaPub.Tests/Support/Harness.cs

@@ -6,6 +6,7 @@ using MongoDB.Entities;
 
 using PrivaPub.Domain.Content;
 using PrivaPub.Domain.Social;
+using PrivaPub.Domain.Statuses;
 using PrivaPub.Domain.Timelines;
 using PrivaPub.Federation.Actors;
 using PrivaPub.Federation.Inbox;
@@ -55,7 +56,8 @@ namespace PrivaPub.Tests.Support
 			Follows = new FollowService(Db, Local, Remote, Delivery, new KeyLocalizer<GenericRes>(), NullLogger<FollowService>.Instance);
 			Content = new ContentRenderer(Local, Remote);
 			Outbox = new OutboxPublisher(Db, Local, Delivery);
-			Posts = new PostsService(Db, Local, Remote, Delivery, Content, Outbox, Fanout, new KeyLocalizer<GenericRes>(), NullLogger<PostsService>.Instance);
+			Statuses = new StatusService(Db, Local, Remote, Delivery, Content, Outbox, Fanout);
+			Posts = new PostsService(Db, Local, Statuses, new KeyLocalizer<GenericRes>(), NullLogger<PostsService>.Instance);
 			Timelines = new TimelineService(Db, new KeyLocalizer<GenericRes>());
 		}
 
@@ -71,6 +73,7 @@ namespace PrivaPub.Tests.Support
 		public ContentRenderer Content { get; }
 		public OutboxPublisher Outbox { get; }
 		public PostsService Posts { get; }
+		public StatusService Statuses { get; }
 		public Fanout Fanout { get; }
 		public RemotePosts RemotePosts { get; }
 		public TimelineService Timelines { get; }