tombstone gate all user paths; cleanup deletes late follower rows; spa self-delete to /; adr 0016 + purge comment

crates/adapters/activitypub/src/tombstone_gate.rs

@@ -27,10 +27,12 @@ pub async fn tombstone_gate(
     next.run(request).await
 }
 
-/// The user id in `/users/{id}/outbox|featured|inbox`.
+/// The user id in any `/users/{id}/...` path (outbox, inbox, collections,
+/// content objects such as `/users/{id}/reviews/{rid}`). The bare actor path
+/// has its own tombstone response.
 pub fn gated_user(path: &str) -> Option<uuid::Uuid> {
     let rest = path.strip_prefix("/users/")?;
     let (id, endpoint) = rest.split_once('/')?;
-    matches!(endpoint, "outbox" | "featured" | "inbox").then_some(())?;
+    (!endpoint.is_empty()).then_some(())?;
     uuid::Uuid::parse_str(id).ok()
 }