bugfix: cosmetics not present during replays (#2074)

## Description:

Cosmetics were not being saved into the GameRecord on game completion.

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

## Please put your Discord username so you can be contacted if a bug or
regression is found:

evan

src/server/GameServer.ts

@@ -675,6 +675,7 @@ export class GameServer {
           persistentID:
             this.allClients.get(player.clientID)?.persistentID ?? "",
           stats,
+          cosmetics: player.cosmetics,
         } satisfies PlayerRecord;
       },
     );