fix: update poster_url on remote review Update activity

on_update was ignoring posterUrl from the AP note, so remote instances
never got the poster even after receiving the Update.

crates/adapters/activitypub/src/remote_review_repository.rs

@@ -23,6 +23,7 @@ pub trait RemoteReviewRepository: Send + Sync {
         rating: u8,
         comment: Option<&str>,
         watched_at: NaiveDateTime,
+        poster_url: Option<&str>,
     ) -> Result<()>;
 
     async fn delete_by_actor(&self, actor_url: &str) -> Result<()>;

crates/adapters/activitypub/src/review_handler.rs

@@ -153,6 +153,7 @@ impl ApObjectHandler for ReviewObjectHandler {
                 obj.rating.min(5),
                 obj.comment.as_deref(),
                 obj.watched_at.naive_utc(),
+                obj.poster_url.as_deref(),
             )
             .await?;