A community announces back to its author's own server

Lemmy keeps its user's post in a community pending until the community announces it back. A community hosted here
announced only to its followers, so a post from a server where nobody follows the community stayed pending there; the
author's own server (its shared inbox) now gets the announces too. INTEROP records, confirmed live, why Lemmy refuses
our Flags (an Application reporter, no `to`, an array object). FEDERATION.md's custom emoji line is put back before the
replies paragraph.

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

FEDERATION.md

@@ -140,7 +140,8 @@ A group is either a **community** or a **circle**.
 
 - A **community** follows [FEP-1b12](https://codeberg.org/fediverse/fep/src/branch/main/fep/1b12/fep-1b12.md). Posts
   addressed to it (in `to`, `cc` or `audience`) are accepted according to its posting policy (followers, anyone, or
-  moderators only) and the group `Announce`s the whole activity, with `audience` set, to its followers. A new post is
+  moderators only) and the group `Announce`s the whole activity, with `audience` set, to its followers and to the
+  author's own server, whether anyone there follows it or not (Lemmy keeps its user's post pending until then). A new post is
   also announced as an object so Mastodon shows it. Updates and deletes of community content are announced too. A
   top-level post is a `Page` with a `name`. Members are counted at `/flock`; moderators are listed at `/wardens`, which
   the actor's `attributedTo` points to, with `postingRestrictedToMods` as Lemmy expects. A mention of a community posts into it.
@@ -291,13 +292,13 @@ a post first met after its edits has them, and an edit that carries them brings
 - **Shown** to clients as GoToSocial's `interaction_policy` (`can_favourite`, `can_reply`, `can_reblog`).
 - Our own posts state only `canQuote`: anyone may reply to, like and boost them.
 
-**Custom emoji** (`Emoji` tags) are read on posts, display names, bios and profile fields, at most 64 per object.
 **Replies its author approves** (FEP-5624's `canReply`, as PeerTube sets it on a video whose comments are moderated; a
 `null` one says nothing): a persona it names, or that the post mentions, may reply, and the reply waits
 (`privapub.approval: pending`), its `Create` going to the author alone. The author's `ApproveReply`, signed by the author
 and naming the post answered, lets it out to its audience with `replyApproval`; a `RejectReply` leaves it ours alone
 (`rejected`). An empty `canReply` refuses every reply (422).
 
+**Custom emoji** (`Emoji` tags) are read on posts, display names, bios and profile fields, at most 64 per object.
 **Profiles** keep their header, profile fields, `manuallyApprovesFollowers`, `published`, `movedTo`, `indexable`,
 `memorial` and avatar and header descriptions. A post's title becomes `name` and is also the first, bold line of `content`, because Mastodon does not show
 `name`. A content warning without its own text uses the title, or "Content warning".