afk larva not properly marked as taken, sends second person to nullspace (??)

## Testmerges
#10926: 'Medals Overhaul' by realforest2001 at commit 7a0acab23d
#10999: 'Fix of various plane related issues' by Blundir at commit f85a7153c4
#11136: 'Coms Rolling Encryption & Punchcards' by Drulikar at commit 2d55de8084
#10954: 'Liquid fuel decals now ignite & Toxic no longer destroys weeds' by Drulikar at commit fd225b3883
#10611: 'White Antre Research Facility - Ground Map' by Steelpoint at commit ae4031871b
#11008: 'Civilian-nization of Researchers, Complete Redesign of the Research Wing/Containment' by LC4492 at commit 5aa8620aa8
#11124: 'Lighting optimizations' by kalazus at commit fb7ee6f2b8
#9948: '[code bounty] Despoiler' by cuberound at commit eb20f58c34
#9952: '[code bounty] Burn changes for Despoiler ' by cuberound at commit 0bfc789d51
#11170: '[WIP] Yautja Survivor' by realforest2001 at commit bc212d67a7

## Round ID
31064

## Description of the bug
2 players took the same larva a few seconds apart, second player was send to hell

## What's the difference with what should have happened?
player should not be able to take a larva already taken

## How do we reproduce this bug?
1) have afk larva
2) someone else takes larva while you have prompt to take it open (??)
3) take larva??
4) get sent to nullspace

## Attached logs
```
Nov 23, 2025 @ 19:17:07.63731064
ADMIN
ADMIN: XXX has joined as Mature Larva (711).
Nov 23, 2025 @ 19:17:12.49531064
ADMIN
ADMIN: XXX has joined as Mature Larva (711).
```

## Additional details
- Author: Vending Machine
- Admin: Vending Machine
- Note: None