Eve Agent: How to limit the duration of Workflow runs?

I'm developing a customer-facing agent with Vercel Eve (https://eve.dev) and SvelteKit.

I've noticed that if the customer does not complete the chat session (e.g., abandons it or closes the page), the workflow keeps running for hours. I'm not 100% sure how Vercel bills for this, and I don't want to be surprised by an extremely high bill, so I want to limit the duration of the workflow run. Is this possible? Unfortunately, Eve's documentation does not have this information.