`irm | iex` runs install.ps1 as text, which execution policy never
checks, but Invoke-InstalledHermes then dot-sourced runtime.ps1 from
disk. That is a file load, and the default Restricted policy (Windows
Sandbox, fresh machines) refused it right after "hermes command
installed". Load the helper from its text instead.
That failure hid a second one on the same path: the `$command` local
was shadowed inside Invoke-Native by its case-insensitive `$Command`
parameter, so `& $command[0]` invoked the scriptblock itself until the
call depth overflowed. Rename the local.
e8d1fc76ec