Vouch request: rksharma-owg

[rksharma-owg]

What do you want to work on?

Fixing issue #3254 where VM driver lifecycle operations (stop, start, delete) fall back to ambiguous name resolution across workspaces when sandbox_id is empty, and making sandbox_id authoritative when present. Also adding duplicate sandbox name validation within the same workspace to match the Docker driver.

Why this change?

If sandboxes across multiple workspaces share the same name and a lifecycle call omits sandbox_id, the VM driver currently resolves the first matching name indiscriminately, risking mutating or stopping the wrong sandbox. Aligning VM driver resolution with the Docker driver ensures safe, predictable lifecycle behavior.

Checklist

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