Description

[Description]
gpg binary is not installed in the sandbox image. Test step "gpg --list-keys" fails with "command not found".

[Environment]
Device: DGX (aarch64)
Kernel: 6.17.0-1008-nvidia
Node.js: v22.22.2
npm: 10.9.7
Docker: Docker Engine 29.1.3
OpenShell CLI: 0.0.24
NemoClaw: 0.1.0
OpenClaw: 2026.3.11 (29dc654)

[Steps to Reproduce]

1. nemoclaw my-assistant connect
2. gpg --list-keys

[Expected Result]
No errors (GPG uses /tmp/.gnupg)

[Actual Result]
sandbox@my-assistant:~$ gpg --list-keys 2>&1
bash: gpg: command not found

[Root Cause Analysis]
The sandbox base image (ghcr.io/nvidia/nemoclaw/sandbox-base:latest) does not include
the gnupg package. GNUPGHOME env var and /tmp/.gnupg directory are correctly configured, but gpg itself is missing.

[NVB# 6059629]

[NVB#6059629]