Memory usage on Linux arm64 is incorrect

Using zenith 0.14.3

I have 4gb on this machine however it's reporting `3.74M`

<img width="1155" height="310" alt="Image" src="https://github.com/user-attachments/assets/2d9c9e3d-68eb-4bfb-997d-d87224b0ee88" />

`htop`output

<img width="1722" height="162" alt="Image" src="https://github.com/user-attachments/assets/c1a1ea1c-c650-4362-b54f-653569a01b2a" />