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/scenarios/lemmy19.sh

@@ -95,13 +95,13 @@ LBT=$(privapub_token bob_lemmy19)
 curl -s -o /dev/null -X POST -H "Authorization: Bearer $LBT" $P/api/v1/statuses -d "status=@lemmyuser@lemmy19.test a word from bob $run&visibility=direct"
 until_true 45 'lm GET "private_message/list?limit=50" | grep -q "a word from bob $run"' && ok "bob's DM to lemmyuser goes as a ChatMessage too" || ko "bob's DM never reached Lemmy 0.19"
 # (0.19 takes a private message only as a ChatMessage and answers a direct Note 400: a first message to someone who
-# never wrote to anyone here is a Note, G-0008. 1.0 takes a Note)
+# never wrote to anyone here goes as a ChatMessage because NodeInfo names Lemmy before 1.0, owner decision 2026-10-05)
 quiet="quiet$run"
 QT=$(site lemmy19.test -s -X POST "$LM/api/v3/user/register" -H 'Content-Type: application/json' \
 	-d "{\"username\":\"$quiet\",\"password\":\"Lemmy-Pasture-Pass-1\",\"password_verify\":\"Lemmy-Pasture-Pass-1\",\"show_nsfw\":false}" | j "print(d['jwt'])")
 curl -s -o /dev/null -X POST -H "$LAH" $P/api/v1/statuses -d "status=@$quiet@lemmy19.test a first word from PrivaPub $run&visibility=direct"
 until_true 30 'site lemmy19.test -s "$LM/api/v3/private_message/list?limit=50" -H "Authorization: Bearer $QT" | grep -q "a first word from PrivaPub $run"' \
-	&& ok "alice's first DM to someone there arrives" || xf "alice's first DM to someone there never arrives, a Note Lemmy 0.19 refuses (G-0008)"
+	&& ok "alice's first DM to someone there arrives as a ChatMessage" || ko "alice's first DM to someone there never arrived"
 
 echo "  moderation"
 p_locked() { curl -s -H "$LAH" "$P/api/v1/statuses/$lm_cats_on_p" | j "print((d.get('privapub') or {}).get('locked'))"; }