Add OS Version to Agent Headers

[vikman90]

Parent Issue: #241

Description

The current request headers for registration, stateful, and stateless operations include an os object like:

"os": { "name": "Ubuntu", "platform": "Linux" }

However, it lacks the operating system version.

Proposal

Add a new field version to the os object to include the operating system version.
Example:

"os": { "name": "Ubuntu", "platform": "Linux", "version": "22.04" }