[Svelte 4][SvelteKit]: using a reactive value for a bind: hangs the server#15824

### Describe the bug If you create a component like so - this is just needed so we can bind to some component ```html <script> export let value = ''; </script> ``` and then try to SSR this ```html <script> import Bind from './Bind.svelte'; $: inputValue = undefined; </script> text <Bind bind:value={inputValue} /> ``` whole sveltekit server hangs. I was able to get an out-of-memory error and crash a few days ago with a bigger reproduction but on a minimal reproduction - it just hangs but I dont get OOM. I'm not sure what did trigger an OOM exactly but I'm pretty sure it was the same bug. Maybe you get an OOM here too, it just takes longer. What triggers the bug I think is the combination of - bind to a component, binding to an element doesn't trigger - bind a reactive value with `$:`, binding a `let` doesn't trigger - set initial value to `undefined`, binding a string doesn't trigger ### Reproduction https://bolt.new/~/sveltejs-kit-template-default-hjq4tjxt Here's a bug demo on bolt.new but you can also export the repo from there and reproduce it locally - I was able to reproduce on node 22.14 and 20.16 ### Logs ```shell ``` ### System Info ```shell - ``` ### Severity annoyance