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

docs/INTEROP-BACKLOG.md

@@ -2,7 +2,7 @@
 
 Generated by `tools/pasture/town.sh backlog --write` from `village-20261005-111857` on 2026-10-05. Do not edit by hand: fix the cause, or record a known gap in `tools/pasture/town/gaps.json`, and generate it again.
 
-Checks: 2557 pass, 4 fail, 1 known gaps, 0 known gaps now passing.
+Checks: 2558 pass, 6 fail, 1 known gaps, 0 known gaps now passing.
 
 ## New failures
 
@@ -10,6 +10,8 @@ Checks: 2557 pass, 4 fail, 1 known gaps, 0 known gaps now passing.
 - **`count.like.community|*|mastodon|control`**: 1 failing. Example: p161 expected `>=1`, got `0`.
 - **`count.boost.public|*|sharkey|control`**: 1 failing. Example: p175 expected `>=1`, got `0`.
 - **`edit.text|privapub|gts|out`**: 1 failing. Example: p4 expected `(edited)`, got `l market harvest rain quiet tide garden festival bridge (p4)`.
+- **`client.render.image.followers|privapub|decepub|local`**: 1 failing. Example: p15 expected `None`, got `picture 'picture 1 of p15' did not load`.
+- **`client.render.image.public|privapub|decepub|local`**: 1 failing. Example: p33 expected `None`, got `picture 'picture 1 of p33' did not load`.
 
 ## Known gaps still failing