Make things pulled by players not despawn when vgroids/uivs/derelicts despawn

[Alkheemist]

About the PR

Added things that are currently being pulled to the list of things to not delete when a grid is dissipated.

Why / Balance

If player doesn't get bluespaced, why should the things they're holding onto get bluespaced?

How to test

Stand on a grid while pulling something
Wait for the grid to despawn
See that thing you are dragging persist, despite the horrors

Media

dotnet_14_23-38-58.mp4

Requirements

• I have read and am following the Pull Request and Changelog Guidelines.
• I have added media to this PR or it does not require an ingame showcase.

Breaking changes

None identified.

Changelog

🆑

• tweak: Objects being pulled by someone when a VGroid/UIV/Derelict disappears should stick around.

[dvir001]

LinkedLifecycleGridSystem.cs is already frontier only, so no need to add frontier comments in it.

[whatston3]

Suggested refactor up here: https://github.com/Alkheemist/frontier-station-14/compare/saving-dragged...whatston3:frontier-station-14:2025-01-21-drag-checks?expand=1

The check for pulled objects is moved to its own function and called from the player character, borg, and other mind container pool. The handled set is renamed for its purpose of skipping already examined mind containers.

Since people can pull people (can pull people...), the duplicates are accounted for at the time of the unparenting - we double check that the entity isn't already in/out of nullspace.

Easy test:
Spawn the vault, summon a bunch of urists/borgs/pun puns. (you'll need clients if you want the borgs/pun puns to stick around). Start a conga line. End the game rule, the entire conga line should stay.

[Alkheemist]

Refactor looks good at first glance, I'll take a deeper look into it now. Sorry about the frontier comments, for some reason I thought this was upstream code and wanted to change it minimally to prevent merge issues but since this is wholly frontier station code a refactor is good. (yes I know it's in the _NF folder, I just didn't notice that until now)

[Alkheemist]

OK, took a look at the refactor, everything seems to be good to me.
We could probably avoid duplicate list entries by using another hashset instead but on the scale of how often this occurs and how few entities being preserved a typical grid being deleted has (maybe 2-3 on a derelict, 5-8 on a vgroid) the performance difference is negligible.

[whatston3]

Thought about this a little - there should be fewer minds than there are mindcontainers, could get the body of anything with a mind and not vice versa.

[Alkheemist]

lmao rip, I just implemented checking for minds instead of mindcontainers. I guess that can be a separate PR.