Filters: words and posts a persona would rather not see

Mastodon's v2 filters replace the empty stubs: a filter's title, contexts,
action (warn, hide, blur) and expiry, its keywords (whole words or not,
taken as JSON objects, listed or numbered form fields, with id and _destroy
on update) and its statuses, each with their own endpoints; the v1 API is
the same filters seen keyword by keyword. Every status a persona reads
carries the filters it matches in `filtered` (a boost as what it boosts),
matched as Mastodon matches: warning, title, text, poll options and media
descriptions. Clients apply context and action. Filters never federate, and
go with a deleted persona.

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

PrivaPub/Infrastructure/Data/Indexes.cs

@@ -106,6 +106,7 @@ namespace PrivaPub.Infrastructure.Data
 			await Plain<Block>(token, b => b.TargetActorURI);
 			await Plain<BlockedBy>(token, b => b.ActorURI);
 			await Plain<PersonaList>(token, l => l.AvatarId);
+			await Plain<PersonaFilter>(token, f => f.AvatarId);
 			await Plain<PersonaListMember>(token, m => m.AvatarId);
 			await Plain<Mute>(token, m => m.TargetActorURI);
 			await Plain<Report>(token, r => r.IsResolved, r => r.ID);