Hello, I am attempting to programmatically pause my deployments once a certain spend limit is reached (https://vercel.com/docs/rest-api/endpoints/projects#pause-a-project). I am struggling to understand the steps in this process. Here are my questions:

1. If Vercel is monitoring my spend, why can't Vercel simply pause my deployment once it reaches a certain limit?
2. Can (or should) I add a Spend Management webhook for every project I have deployed?
3. Can one webhook pause multiple or all projects?
4. Once I think I have the correct API route initiated, how can I test if it actually works?
5. Might there be a step-by-step tutorial available for this particular topic?

Thanks in advance, I'm eager to learn!

David