[BUG]: syncShapesToTables weird behaviour

**Describe the bug**
See: https://github.com/electric-sql/pglite/issues/888#issue-3907347969.

I closed it and do not have the permissions to reopen.

This seems to be caused by the caching of shape requests.

Using a manipulated fetchClient (https://electric-sql.com/docs/api/clients/typescript#options) seems to solve (?) the issue:

```javascript
const noCacheFetch: typeof fetch = (input, init) =>
fetch(input, { ...init, cache: 'no-store' })
```

I'm pretty sure this is not a good idea though.

It seems this is expected behaviour, see: https://github.com/electric-sql/electric/issues/2995#issuecomment-3193752736. But if so, maybe the docs should be more explicit? Most probably though I have just not understood how to do this correctly.