Moves carry follows over; first DMs to Lemmy 0.19 and Mbin go as ChatMessage

Two owner decisions of 2026-10-05, both recorded in ROADMAP:
- After a verified Move the personas following the old account follow the new one, in the same lists, and a mute or
  block of the old account carries over, as Mastodon does it.
- A direct message to one account on a server whose NodeInfo names Lemmy before 1.0 or Mbin goes as a ChatMessage,
  the one place PrivaPub decides by a server's software (invariant 17). G-0008 is closed.

Mbin addresses its private messages to the recipient's profile page, so a Create addressed to a persona's /@name now
reaches the persona. Checked live: moves 8/8, Lemmy 0.19 30/30, Mbin 26/26 with messages both ways. The software
theory runs alone, since every test's peer shares 127.0.0.1.

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

PrivaPub/Federation/Inbox/Handlers/CreateHandler.cs

@@ -133,12 +133,16 @@ namespace PrivaPub.Federation.Inbox.Handlers
 				.Distinct(StringComparer.Ordinal)
 				.ToList();
 			var localTargets = new List<LocalActor>();
-			foreach (var uri in addressed)
+			for (var i = 0; i < addressed.Count; i++)
 			{
-				var local = await _localActors.FindByUri(uri, token);
-				if (local is { IsFederated: true } && localTargets.All(l => l.Id != local.Id))
+				var local = await _localActors.FindByAddress(addressed[i], token);
+				if (local == default)
+					continue;
+				addressed[i] = local.Uri;
+				if (local.IsFederated && localTargets.All(l => l.Id != local.Id))
 					localTargets.Add(local);
 			}
+			addressed = addressed.Distinct(StringComparer.Ordinal).ToList();
 			var persons = localTargets.Where(t => t.Kind == LocalActorKind.Person).ToList();
 
 			var parent = string.IsNullOrEmpty(note.InReplyTo)