Add support for git branches on remote projects (#19755)

Release Notes:

- Fixed a bug where the branch switcher could not be used remotely.

crates/rpc/src/proto_client.rs

@@ -123,7 +123,6 @@ impl ProtoMessageHandlerSet {
             let extract_entity_id = *this.entity_id_extractors.get(&payload_type_id)?;
             let entity_type_id = *this.entity_types_by_message_type.get(&payload_type_id)?;
             let entity_id = (extract_entity_id)(message.as_ref());
-
             match this
                 .entities_by_type_and_remote_id
                 .get_mut(&(entity_type_id, entity_id))?
@@ -145,6 +144,26 @@ pub enum EntityMessageSubscriber {
     Pending(Vec<Box<dyn AnyTypedEnvelope>>),
 }
 
+impl std::fmt::Debug for EntityMessageSubscriber {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            EntityMessageSubscriber::Entity { handle } => f
+                .debug_struct("EntityMessageSubscriber::Entity")
+                .field("handle", handle)
+                .finish(),
+            EntityMessageSubscriber::Pending(vec) => f
+                .debug_struct("EntityMessageSubscriber::Pending")
+                .field(
+                    "envelopes",
+                    &vec.iter()
+                        .map(|envelope| envelope.payload_type_name())
+                        .collect::<Vec<_>>(),
+                )
+                .finish(),
+        }
+    }
+}
+
 impl<T> From<Arc<T>> for AnyProtoClient
 where
     T: ProtoClient + 'static,