Use prlimit

[josephjclark]

Short Description

Implementation Details

Spun out of #1370

AI Usage

Please disclose whether you've used AI anywhere in this PR (it's cool, we just
want to know!):

• I have used Claude Code
• I have used another model
• I have not used AI

You can read more details in our
Responsible AI Policy

[josephjclark]

Fantastic. Wasted a whole day on getting this ready and it turns out it's just not going to work.

This won't help us. The address space limit we set has to be siginificantly larger than the space required by a run. I'll post more detai in #1370.

tl;dr: If I set AS to 1gb using rlimit, thenthe node process won't even run. We need to let it allocate way more memory (the original PR uses 10x the limit). That means kubernetes will kill the pod way before the rlimit kicks in.