[WIP] Recreating R14 error with minimal code and finding a fix

[deepsp94]

Problem: Running the following script on Linux throws the R14 error (excessive memory use).

The graph shows that memory use increases continuously. At the 0.5 GB mark, Heroku (which runs on linux OS) periodically throws the R14 error and at the 1 GB mark it shuts down and restarts the whole process (dyno).
Script: https://github.com/overlay-market/overlay-risk/blob/heroku-r14/scripts/r14_error.py

Background:

1. The script is using pystable, which is a python wrapper of the C library libstable. The excessive memory use is due to the use of pystable.
2. Pystable is only usable on mac computers or linux OS with glibc versions 2.31/2.32 (heroku runs on linux with glibc 2.31)
3. Running the same script on a mac computer (m1) doesn't result in monotonically increasing use of memory. I've observed this behaviour on Linux only.

Objective: The script should work on Linux without memory issues.

Resources to get started:
How to install pystable: https://pypi.org/project/pystable/
Pystable repo: https://github.com/overlay-market/pystable
Libstable resources: https://www.jstatsoft.org/article/view/v078i01
About R14 error in the context of ruby applications: https://devcenter.heroku.com/articles/ruby-memory-use