feat(ap): @mention notification from inbound remote Notes

crates/adapters/activitypub-base/src/content.rs

@@ -55,6 +55,14 @@ pub trait ApObjectHandler: Send + Sync {
     /// Called when a remote actor removes a Like from a local thought.
     async fn on_unlike(&self, object_url: &Url, actor_url: &Url) -> anyhow::Result<()>;
 
+    /// Called when an inbound Note tags a local user with a Mention.
+    async fn on_mention(
+        &self,
+        thought_ap_id: &Url,
+        mentioned_user_uuid: uuid::Uuid,
+        actor_url: &Url,
+    ) -> anyhow::Result<()>;
+
     /// Total number of locally-authored posts across all users.
     async fn count_local_posts(&self) -> anyhow::Result<u64>;
 }