P6: custom emoji, fuller remote profiles, and polls both ways

- Custom emoji (Emoji tags) on posts, display names, bios and profile fields, at most 64 per object, proxied, in
  Status.emojis and Account.emojis.
- Remote profiles keep their header, profile fields, locked flag, published date, movedTo, indexable, memorial and
  image descriptions (a locked GoToSocial account no longer shows as open).
- Polls: incoming Questions (Mastodon, Misskey, Pleroma, GoToSocial shapes) with counts, voters, end and closed;
  our own polls from the Mastodon API go out as Questions; votes in are counted once per voter and never become
  replies; personas vote on other servers' polls with one Note per choice; counts refresh with an Update at most every
  three minutes; a poll closes on time and tells its voters and its author. GET /api/v1/polls/:id and POST
  /api/v1/polls/:id/votes.
- An Update without a newer `updated` only refreshes poll, video, audio and event details and leaves no revision.

Checked live against GoToSocial: each side's poll reaches the other as a poll and each side's vote is counted.

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

PrivaPub.Tests/Support/Harness.cs

@@ -44,6 +44,7 @@ namespace PrivaPub.Tests.Support
 			Fanout = new Fanout(Db);
 			Groups = new GroupDistributor(Delivery);
 			Records = new ObjectRecords(Queue);
+			Polls = new PollService(Db, Local, Delivery, Queue);
 			RemotePosts = new RemotePosts(Db, Local, Remote, new NoBlocks(), Queue, Records);
 			Receiver = new InboxReceiver(Local, Remote, Queue, new NoBlocks(), NullLogger<InboxReceiver>.Instance);
 			Processor = new InboxProcessor(Remote, new IActivityHandler[]
@@ -56,7 +57,7 @@ namespace PrivaPub.Tests.Support
 				new DislikeHandler(Db),
 				new JoinHandler(Db, Local, Delivery),
 				new AnnounceHandler(Db, Local, RemotePosts, Fanout, Remote),
-				new CreateHandler(Db, Local, Remote, Delivery, new NoBlocks(), Fanout, RemotePosts, Groups, Records),
+				new CreateHandler(Db, Local, Remote, Delivery, new NoBlocks(), Fanout, RemotePosts, Groups, Records, Polls),
 				new DeleteHandler(Db, Local, Remote, Delivery, Groups),
 				new UpdateHandler(Db, Local, Remote, Groups, Records),
 				new FlagHandler(Db, Local)
@@ -66,7 +67,7 @@ namespace PrivaPub.Tests.Support
 			Outbox = new OutboxPublisher(Db, Local, Delivery);
 			Media = new MediaService(new StaticOptions<MediaOptions>(new MediaOptions { Root = Path.Combine(Path.GetTempPath(), $"privapub-media-{Guid.NewGuid():N}") }),
 				Local, default, NullLogger<MediaService>.Instance);
-			Statuses = new StatusService(Db, Local, Remote, Delivery, Content, Outbox, Fanout, Media, Groups);
+			Statuses = new StatusService(Db, Local, Remote, Delivery, Content, Outbox, Fanout, Media, Groups, Polls);
 			Posts = new PostsService(Db, Local, Statuses, new KeyLocalizer<GenericRes>(), NullLogger<PostsService>.Instance);
 			Timelines = new TimelineService(Db, new KeyLocalizer<GenericRes>());
 			Relationships = new RelationshipService(Db, Follows, Delivery);
@@ -91,6 +92,7 @@ namespace PrivaPub.Tests.Support
 		public Fanout Fanout { get; }
 		public RemotePosts RemotePosts { get; }
 		public ObjectRecords Records { get; }
+		public PollService Polls { get; }
 		public TimelineService Timelines { get; }
 		public RelationshipService Relationships { get; }
 		public ReportService Reports { get; }