Is your feature request related to a problem? Please describe.
Given clients can override the server keep_alive parameter, even if the server has a higher value

Describe the solution you'd like
Enable the site admin to set a default value for all users. Ideally, only the admin should set this value instead of leaving it up to individual users.

Additional context
I appreciate that this feature was added recently to support ollama's keep_alive parameter. Not being able to control it as an admin makes things difficult to keep the system responsive as I need it.