Function randomUuidFallback

randomUuidFallback(scope: CryptoScope): boolean
Add crypto.randomUUID to a scope that lacks it, built on crypto.getRandomValues, which browsers expose outside secure contexts.

Self-contained so renderRandomUuidFallbackScript can serialise it into an applet's srcdoc: an opaque-origin frame inherits its parent's insecure context, and the applet runtime calls randomUUID per request.
Parameters
- scope: CryptoScope
  The global to patch, usually window.
Returns boolean
Whether it added the function.
Example
```
randomUuidFallback(globalThis); // false where randomUUID already exists
```