Update Node and switch back to pnpm

[Huskydog9988]

Upgrade to Node v24, and switch back to pnpm for better security model + caching.

[Protonull]

Why the switch back to pnpm?

[Protonull]

You'll also need to update the key-pair encryption algorithm since the security revert that permits the continued use of PKCS#1 v1.5 is gone in v24 (v18..v24). The server will start up fine but will error on any attempt to decrypt anything.

• 1.19.2 Version! #103 Proposed a switch to RSA/NONE/OAEPPadding
• Switch to OAEP padding #108 Proposed a switch to RSA/ECB/OAEPWithSHA-256AndMGF1Padding
• Switch to Bun and websockets #106 Proposed the switch to websockets, deferring all encryption to a TLS reverse proxy

[Huskydog9988]

Yea I'll update the algorithm, thought the client was broken for another reason lol. I switched back to pnpm because it drastically reduces the file size of node_modules, installing packages is faster too, (both of which benefit ci), and makes it so you can't import transitive dependencies. Plus, pnpm makes a whole bunch of improvements to the npm security model.

[Protonull]

After discussing this in Discord, I'm going to merge this, re-open and merge #108, and then begin working on websockets.