Followed hashtags, and a tag's week of use

tags/:name shows the tag's last seven days in public posts PrivaPub holds
(uses and authors, as Mastodon gives them) and whether the persona follows
it; follow, unfollow and followed_tags replace the stubs. A public post that
is neither a boost nor a reply comes, as it arrives, to the homes of those
following one of its tags. Nothing is fetched for a followed tag and no
other server hears of it. Posts are indexed by tag.

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

PrivaPub/Infrastructure/Data/Indexes.cs

@@ -95,6 +95,7 @@ namespace PrivaPub.Infrastructure.Data
 			foreach (var pair in new (Func<Task>, string)[]
 			{
 				(() => DB.Default.Index<Block>().Key(b => b.AvatarId, KeyType.Ascending).Key(b => b.TargetActorURI, KeyType.Ascending).Option(o => o.Unique = true).CreateAsync(token), "block"),
+				(() => DB.Default.Index<FollowedTag>().Key(t => t.AvatarId, KeyType.Ascending).Key(t => t.Name, KeyType.Ascending).Option(o => o.Unique = true).CreateAsync(token), "followed tag"),
 				(() => DB.Default.Index<PersonaListMember>().Key(m => m.ListId, KeyType.Ascending).Key(m => m.AccountId, KeyType.Ascending).Option(o => o.Unique = true).CreateAsync(token), "list member"),
 				(() => DB.Default.Index<BlockedBy>().Key(b => b.AvatarId, KeyType.Ascending).Key(b => b.ActorURI, KeyType.Ascending).Option(o => o.Unique = true).CreateAsync(token), "blocked by"),
 				(() => DB.Default.Index<Mute>().Key(m => m.AvatarId, KeyType.Ascending).Key(m => m.TargetActorURI, KeyType.Ascending).Option(o => o.Unique = true).CreateAsync(token), "mute"),
@@ -107,6 +108,8 @@ namespace PrivaPub.Infrastructure.Data
 			await Plain<BlockedBy>(token, b => b.ActorURI);
 			await Plain<PersonaList>(token, l => l.AvatarId);
 			await Plain<PersonaFilter>(token, f => f.AvatarId);
+			await Plain<FollowedTag>(token, t => t.Name);
+			await Plain<Post>(token, p => p.Tags);
 			await Plain<PersonaListMember>(token, m => m.AvatarId);
 			await Plain<Mute>(token, m => m.TargetActorURI);
 			await Plain<Report>(token, r => r.IsResolved, r => r.ID);