Add TODOs for the client_id not being the expected type

Author: westonruter

src/wp-includes/collaboration/class-wp-http-polling-collaboration-server.php

@@ -251,6 +251,7 @@ public function check_permissions( WP_REST_Request $request ) {
 		$wp_user_id = get_current_user_id();
 
 		foreach ( $rooms as $room_data ) {
+			// TODO: $client_id is actually an int<1, max> here, even though the type says it is non-empty-string (to correspond with the client_id as varchar(32) in the schema).
 			$client_id = $room_data['client_id'];
 			$room      = $room_data['room'];
 
@@ -352,6 +353,7 @@ public function handle_request( WP_REST_Request $request ) {
 
 		foreach ( $rooms as $room_request ) {
 			$awareness = $room_request['awareness'];
+			// TODO: $client_id is actually an int<1, max> here, even though the type says it is non-empty-string (to correspond with the client_id as varchar(32) in the schema).
 			$client_id = $room_request['client_id'];
 			$cursor    = $room_request['after'];
 			$room      = $room_request['room'];