allow http session reuse

[rbren]

End-user friendly description of the problem this fixes or functionality that this introduces

• Include this change in the Release Notes. If checked, you must provide an end-user friendly description for your change below
  Fix for continuing sessions, which would originally result in a session_was_closed error

---

Give a summary of what the PR does, explaining any non-trivial design decisions

We should fix the underlying issue here, but this is a quick fix to make the app more usable.

---

Link of any specific issues this addresses

---

To run this PR locally, use the following command:

docker run -it --rm   -p 3000:3000   -v /var/run/docker.sock:/var/run/docker.sock   --add-host host.docker.internal:host-gateway   -e SANDBOX_RUNTIME_CONTAINER_IMAGE=docker.all-hands.dev/all-hands-ai/runtime:88a4d89-nikolaik   --name openhands-app-88a4d89   docker.all-hands.dev/all-hands-ai/openhands:88a4d89

[enyst]

Thanks, makes sense

[tofarr]

🍰 - But we will need to check periodically for open file descriptors