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/Federation/InboxScenarioTests.cs

@@ -8,6 +8,7 @@ using PrivaPub.Federation.Actors;
 using PrivaPub.Federation.Inbox.Handlers;
 using PrivaPub.Federation.Inbox;
 using PrivaPub.Federation.Moderation;
+using PrivaPub.Domain.Statuses;
 using PrivaPub.Federation.Objects;
 using PrivaPub.Federation.Outbox;
 using PrivaPub.Infrastructure.Jobs;
@@ -54,7 +55,7 @@ namespace PrivaPub.Tests.Federation
 			{
 				new FollowHandler(db, _local, remote, delivery),
 				new UndoHandler(db, _local),
-				new CreateHandler(db, _local, remote, delivery, _blocks, new Fanout(db), new RemotePosts(db, _local, remote, _blocks, queue, new ObjectRecords(queue)), new GroupDistributor(delivery), new ObjectRecords(queue)),
+				new CreateHandler(db, _local, remote, delivery, _blocks, new Fanout(db), new RemotePosts(db, _local, remote, _blocks, queue, new ObjectRecords(queue)), new GroupDistributor(delivery), new ObjectRecords(queue), new PollService(db, _local, delivery, queue)),
 				new DeleteHandler(db, _local, remote, delivery, new GroupDistributor(delivery)),
 				new UpdateHandler(db, _local, remote, new GroupDistributor(delivery), new ObjectRecords(queue))
 			}, NullLogger<InboxProcessor>.Instance);