Airlock Finishing step bug

## Testmerges
#12480: 'Sneaky Hijack Edgecase + Transmute Fixes' by Drulikar at commit be2730f9cf
#12542: 'Xeno defensive grab' by Drulikar at commit 71a0cb6906
#12573: 'Opensearch query builder' by fira at commit 4364144f53
#12626: 'Refurbished Combat Information Centre (2) - USS Almayer' by Steelpoint at commit c167971a27
#12182: 'Multiz projectile balance' by cuberound at commit 864049540e
#12706: 'MapGrids: QuadTrees Replacement' by fira at commit a93271db4b
#12434: 'Attempts to fix runaway explosion recursion' by Drulikar at commit cd4a1137c5
#12627: 'Tyrargo Rift (2) - Various Alterations' by Steelpoint at commit 39578b0c44
#12751: 'Remove rotation updates each-tick on projectiles' by fira at commit 64cba7cda2
#11804: 'Some more gun.dm nonsense' by Nihisohel at commit 9ccd9a661b
#12640: 'Fuel pumps have health during hijack + bullet ping fix + trapper shotgun flag fix' by Drulikar at commit f5a7f3b9f8
#12464: 'LV1021: Operation Falcon's Fury - Ground Map' by Steelpoint at commit e9ca7f7177

## Round ID
35576

## Description of the bug
Change Airlock appearance type, command was used in this one, attempt to weld, to finish airlock off, welding will not complete the airlock but instead leave you with a incomplete airlock

## What's the difference with what should have happened?
A compete airlock.

## How do we reproduce this bug?
1.Construct airlock until able to change type.
2. Change type to command or possibly others
3. Attempt to weld to finish

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

## Additional details
- Author: Digitalattack
- Admin: SmellyHippie
- Note: None

Reproduce the issue by constructing an airlock, changing its appearance type to command, and attempting to weld it to completion. No source file or test is named; done means the airlock finishes construction instead of remaining incomplete, and the existing linked pull request should be checked for related work.

Written by the indexing model from the issue text.