Vouch request: Ash20pk

[Ash20pk]

What do you want to work on?

• I want to fix ocsf_json_enabled silently writes nothing with the MicroVM driver (supervisor cannot open /var/log) #3855
• What it is: with the MicroVM driver on macOS, ocsf_json_enabled reports success but no OCSF JSON file is ever written, because the supervisor runs as my user and can't open the hard-coded /var/log.
• my fix: a --log-dir / OPENSHELL_LOG_DIR option on the supervisor, the VM driver pointing it at the sandbox's state dir, and a proper warning when there's no sink. Already built and tested against v0.1.2;

Why this change?

I am building an audit/evidence pipeline on OpenShell at OpenBox, and I need the OCSF export to be reliable on every driver. Silently doing nothing while reporting success is the worst kind of failure for an audit log.

Checklist

• I wrote this request myself (not AI-generated)
• I have read CONTRIBUTING.md