fix(ci): keep e2e paths on the prior Node until Playwright is upgraded

Playwright 1.52 hangs while loading its config on Node 24.18.1. Keep
shell.nix and the CI e2e job on the earlier Node 24 and document why;
Bun stays pinned to 1.3.11 everywhere.
d723b283d5flamboh committed on 9/28/2026, 9:49:16 PMparentdff26e1
3 files changedLine totals unavailable