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

tools/pasture/town/gaps.json

@@ -119,7 +119,8 @@
 		"phase": "P3",
 		"code": "lemmy 0.19.20 crates/apub/src/protocol/objects/chat_message.rs: ChatMessageType has ChatMessage alone, so a Create{Note} to a person answers 400 (Lemmy 1.0 takes a Note); mbin 1.10.1 src/Service/ActivityPub/ActivityPubContent.php getVisibility(): a Note neither public nor to the author's followers throws 'PM: not implemented'",
 		"opened": "2026-10-05",
-		"status": "open",
-		"note": "Since 2026-10-05 a direct message to someone who writes to us as ChatMessages goes out as one (Post.AsChatMessage), so answers arrive. A first message to someone who never wrote to anyone here is still a Note: neither server's actors say what they take, and PrivaPub never decides by a server's software name, so that waits for the owner. Pleroma and Akkoma file a ChatMessage as a chat apart from direct messages, so sending both would show them twice. Mbin's API never starts a conversation with an account elsewhere."
+		"status": "closed",
+		"note": "Closed by the owner's decision of 2026-10-05: a direct message to one account goes as a ChatMessage when the account writes to us that way, or when its server's NodeInfo names Lemmy before 1.0 or Mbin (the one place PrivaPub decides by software). Checked live: Lemmy 0.19's first message and Mbin's thread both ways.",
+		"closed": "2026-10-05"
 	}
 ]