A community's comments reach its microblog members

A comment in a community was announced only as Announce{Create}, which
Akkoma, Mastodon and Misskey drop: their members never saw it (the village
found Akkoma's missing). A comment is now also announced as itself, as a
new post already was; Lemmy answers that form 400, harmlessly. Nothing is
decided by the follower's software.

The town's checker expects a followers-only quote to stay with the
followers, and G-0003 covers only Lemmy-hosted communities (their relayed
moderation), since relayed likes count.

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

PrivaPub/Federation/Outbox/GroupDistributor.cs

@@ -67,6 +67,8 @@ namespace PrivaPub.Federation.Outbox
 			// announces it back, and clears that before it answers the echo 400 ("Object is not remote").
 			await _delivery.EnqueueToFollowers(group, announce, token);
 			await Keep(group, announce, objectUri, token);
+			// a new post or comment is also boosted as itself: microblogs (Mastodon, Akkoma, Misskey) drop an Announce of an
+			// activity, so without it their members never see what is said in the community; Lemmy answers it 400, harmlessly
 			if (isNewPost && !string.IsNullOrEmpty(objectUri))
 			{
 				var boost = ActivityPubRenderer.Announce(group, objectUri, $"announce-object-{key}");