T12: Misskey 2026.10 in the pasture

peers/misskey.sh runs Misskey on the shared Postgres and Redis. Its config is generated with
the pasture's private networks allowed and a setup password, it trusts Caddy's CA through
NODE_EXTRA_CA_CERTS, and the first account it makes is the scenario's user. A new Misskey
federates with nobody, so the setup also turns federation on.

scenarios/misskey.sh adds 35 checks, all passing, as listed in docs/INTEROP.md. They cover
posts, CW, MFM source, replies, unicode reactions both ways and their withdrawal, likes as
reactions, legacy quotes both ways, polls, specified notes, media, deletes, unfollow,
block and statistics. MISSKEY_NAME and MISSKEY_IMAGE are there so Sharkey can reuse the peer.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01ELjqpznMFMNrJoJUj6K5p2

docs/INTEROP.md

@@ -310,6 +310,21 @@ Firefish is dead (its site has answered 410 since February 2025).
 | Per-attachment `sensitive`; `isCat` and other actor extras; enforce `requireSignin…` and `makeNotes…Before` on our public pages | P2 | own `privapub.*` |
 | Quotes: when we send one, send every key (`quote`, `_misskey_quote`, `quoteUrl`, `quoteUri`, a FEP-e232 tag, the `RE:` fallback) | P2 | — |
 
+**Pasture evidence (2026-10-03, Misskey 2026.10.0, `tools/pasture/scenarios/misskey.sh`):** 35 checks pass:
+- discovery and follows both ways;
+- posts, CW and the MFM `source` kept;
+- replies threading both ways;
+- 👍 and 🎉 reactions both ways, and their withdrawal;
+- a like counting as a reaction;
+- legacy quotes both ways (`_misskey_quote` in, `renoteId` out);
+- polls and votes both ways;
+- `specified` notes as DMs both ways;
+- images with alt text (`comment`) both ways;
+- deletes both ways, unfollow and block;
+- statistics.
+
+A new Misskey 2026 starts with `federation: none`.
+
 ### Pleroma 2.10.2 and Akkoma 3.20.1
 
 **Emits**