[Feature]: inactivity_duration in-place update

[jvstme]

Problem

inactivity_duration cannot be updated for an already running dev environment. Updating it in-place might be useful for some scenarios. For example:

1. User starts a dev environment with a short inactivity_duration.
2. User runs a training interactively, but it takes longer than expected.
3. User wants to set a longer inactivity_duration to keep the dev environment running overnight.

Solution

Support inactivity_duration in-place update.

Workaround

No response

Would you like to help us implement this feature by sending a PR?

Yes