#12793 breaks yautja HPCs

## Testmerges
#12824: 'Bundles Wound Overlay Updates' by fira at commit 6b48f2d5f1
#12537: 'Atlan Station - Groundmap' by oceany-a11y at commit ec733f9e2b
#12721: 'Assorted Sound Fixes' by fira at commit 8b5bf0b649
#12618: 'Vanguard Passive Shield no longer regenerates when UNCONSCIOUS or INCAPACITATED, FLOORED, updated strain description.' by Venuska1117 at commit 813c96e27b
#12627: 'Tyrargo Rift (2) - Various Alterations' by Steelpoint at commit dbc4496523
#12626: 'Refurbished Combat Information Centre (2) - USS Almayer' by Steelpoint at commit 86a9778d04
#12947: 'Revert "Working multiz tacmap, round two, extra buttons"' by Rain7x at commit ea384007a4
#12996: 'Records alive/dead/infected/revivable players every minute to influxdb' by Watermelon914 at commit 6869feb8ab
#13003: 'Alternative Sentinel Oxy Damage Nerf' by lilacrhododendron at commit ffef61ade2
#12968: 'M44 Combat Revolver Buff' by AnCopper at commit 36003ac967
#12793: 'Explosion Waves: Visual update and Backend rewrite' by fira at commit 2bf0ee8c91
#13027: 'Add Multi-Z handling to get_line' by MistChristmas at commit 93c1896d91

## Round ID
36065

## Description of the bug
Yautja's lethal HPC setting does not cause explosions anymore on any lethal setting.

## What's the difference with what should have happened?
Plasma bolt setting should have a 1x1 explosion while plasma eradicator is a 4x4 I think.

## How do we reproduce this bug?
Spawn in as a yautja

Enable your HPC and change the setting by using "Unique button" to make it lethal

Shoot any human mob and they will only take damage. The SFX of the explosion remains.

## Attached logs
```
N/A
```

## Additional details
- Author: MrSmiley316
- Admin: MrSmiley316
- Note: None

Start by reviewing pull request #12793, “Explosion Waves: Visual update and Backend rewrite,” then trace the Yautja HPC lethal-setting path described in the reproduction steps. Reproduce the issue by firing the lethal plasma bolt and plasma eradicator settings at a human mob; done means the expected 1x1 and 4x4 explosions occur while the existing damage and sound behavior remain intact.

Written by the indexing model from the issue text.