Followers and circle members may like, react, vote and downvote

LikeHandler.MaySee let a remote account interact with a followers-only
post only when the post named it in to, cc or its mentions. Our own
followers-only posts are addressed to the followers collection, never to
each follower, and circle posts were not considered at all, so every
like, reaction, downvote and poll vote from a follower on a
followers-only post, and from a member on a circle post, was dropped as
"not-visible". Likes, dislikes, reactions and poll votes now ask
VisibilityPolicy.RemoteCanSee: anyone for public and unlisted posts, an
addressed account for a DM, an accepted follower or an addressed account
for followers-only, a foreign member for a circle post, and never a
server's instance actor (SignedFetchAuthorizer's alias is for refetches
only).

Found by planning the town's multi-server interaction checks (G-0001).

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

PrivaPub/Domain/Statuses/PollService.cs

@@ -1,6 +1,7 @@
 using MongoDB.Driver;
 using MongoDB.Entities;
 
+using PrivaPub.Domain.Privacy;
 using PrivaPub.Domain.Social;
 using PrivaPub.Federation.Actors;
 using PrivaPub.Federation.Inbox.Handlers;
@@ -120,7 +121,7 @@ namespace PrivaPub.Domain.Statuses
 		public async Task Receive(PostEntity post, ForeignAvatar voter, string choice, string activityId, CancellationToken token)
 		{
 			var poll = post.Poll;
-			if (poll == default || post.IsFederatedCopy || Ended(poll) || !LikeHandler.MaySee(post, voter))
+			if (poll == default || post.IsFederatedCopy || Ended(poll) || !await VisibilityPolicy.RemoteCanSee(post, voter, token))
 				return;
 			var index = poll.Options.FindIndex(o => o.Title == choice);
 			if (index < 0)