fix(e2e): replace brittle source-string assertion in skill CLI test

[hunglp6d]

Summary

✨ [AI-generated PR]

The openclaw-skill-cli-e2e nightly job fails because OpenClaw >= 2026.5.27 classifies all installed skills as openclaw-bundled regardless of install origin. The test's hard-coded grep -Fq openclaw-workspace assertion always fails.

This PR replaces the raw grep with a structured Python JSON check that confirms the fixture skill is present in the list output by name. The workspace install path is already validated on disk in Phase 4, so source-field classification is no longer a correctness gate.

Root Cause

OpenClaw's skills list --json output changed its source field taxonomy. Previously workspace-installed skills reported source: openclaw-workspace; now they report source: openclaw-bundled. The E2E test was coupled to the old string value.

Changes

• test/e2e/test-openclaw-skill-cli-e2e.sh: Replace grep -Fq openclaw-workspace with a Python-based structured JSON check that locates the fixture skill by name in the parsed list output.

Nightly Run

• Failing run: https://github.com/NVIDIA/NemoClaw/actions/runs/27450816965
• Failing job: openclaw-skill-cli-e2e / run
• Error: FAIL: Expected at least one entry with source openclaw-workspace in openclaw skills list --json output
• Classification: test_failure — assertion coupled to internal OpenClaw source classification string

Test Plan

• Re-run openclaw-skill-cli-e2e E2E job with this fix
• Verify the structured check passes when skill is present regardless of source field value
• Confirm all other assertions in the test still pass

Signed-off-by: Hung Le hple@nvidia.com

Fixes #5378

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