Ensure worktree updates are observed in order on the server

crates/server/src/rpc/store.rs

@@ -537,6 +537,7 @@ impl Store {
         connection_id: ConnectionId,
         project_id: u64,
         worktree_id: u64,
+        update_id: u64,
         removed_entries: &[u64],
         updated_entries: &[proto::Entry],
     ) -> tide::Result<Vec<ConnectionId>> {
@@ -548,6 +549,11 @@ impl Store {
             .share
             .as_mut()
             .ok_or_else(|| anyhow!("worktree is not shared"))?;
+        if share.next_update_id != update_id {
+            return Err(anyhow!("received worktree updates out-of-order"))?;
+        }
+
+        share.next_update_id = update_id + 1;
         for entry_id in removed_entries {
             share.entries.remove(&entry_id);
         }