patchState overload that takes a function does not enforce type safety

[EthanSK]

Which @ngrx/* package(s) are the source of the bug?

signals

Minimal reproduction of the bug/regression with instructions

      patchState(store, (state) => ({
               'field not in type': ":(" //this is allowed
           
              })),

Expected behavior

It should complain if the field is not in the state's type.
The version of patchState that doesn't take a function but instead an object as 2nd param complains as expected

Versions of NgRx, Angular, Node, affected browser(s) and operating system(s)

ngrx 19, angular 19, node 21, macos

Other information

No response

I would be willing to submit a PR to fix this issue

• Yes
• No