add some more tracing exclusions

src/client_server/sync.rs

@@ -130,6 +130,7 @@ pub async fn sync_events_route(
     result
 }
 
+#[tracing::instrument(skip(db, tx))]
 async fn sync_helper_wrapper(
     db: Arc<DatabaseGuard>,
     sender_user: UserId,
@@ -176,6 +177,7 @@ async fn sync_helper_wrapper(
 
 const THIRTY_SECONDS: Duration = Duration::from_secs(30);
 
+#[tracing::instrument(skip(db))]
 async fn sync_helper(
     db: &Database,
     sender_user: &UserId,
@@ -230,6 +232,7 @@ async fn sync_helper(
     Ok((response, since != next_batch))
 }
 
+#[tracing::instrument(skip(db))]
 fn collect_response(
     db: &Database,
     since: u64,