chore: remove smoke-codex workflow due to missing key

[Copilot]

Remove the Codex engine smoke test workflow since we don't have the API key.

Changes

• Remove .github/workflows/smoke-codex.lock.yml and .github/workflows/smoke-codex.md
• Update tests/README.md and tests/TEST_RESULTS.md to remove smoke-codex references

Original prompt

remove smoke-codex since we don't have the key

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[github-actions]

✅ Coverage Check Passed

Overall Coverage

Metric	Base	PR	Delta
Lines	77.19%	77.19%	➡️ +0.00%
Statements	77.27%	77.27%	➡️ +0.00%
Functions	77.17%	77.17%	➡️ +0.00%
Branches	69.76%	69.76%	➡️ +0.00%

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Coverage comparison generated by scripts/ci/compare-coverage.ts

[github-actions]

📰 VERDICT: Smoke Copilot has concluded. All systems operational. This is a developing story. 🎤

[github-actions]

🎬 THE END — Smoke Claude MISSION: ACCOMPLISHED! The hero saves the day! ✨

[github-actions]

Smoke Test Results

Last 2 merged PRs:

• ci: add agentic documentation preview workflow with Playwright #246: ci: add agentic documentation preview workflow with Playwright
• feat: port plan workflow from gh-aw repository #230: feat: port plan workflow from gh-aw repository

Test Results:

• ✅ GitHub MCP: Retrieved PR list
• ✅ Playwright: Navigated to GitHub (title: "GitHub · Change is constant. GitHub keeps you ahead. · GitHub")
• ✅ File Writing: Created test file
• ✅ Bash: Verified file contents

Status: PASS

AI generated by Smoke Claude

[github-actions]

Smoke Test Results

Last 2 merged PRs:

• feat: port plan workflow from gh-aw repository #230: feat: port plan workflow from gh-aw repository
• ci: pin GitHub Actions to commit SHAs for supply chain security #266: ci: pin GitHub Actions to commit SHAs for supply chain security

✅ GitHub MCP - Successfully retrieved PR data
❌ Playwright - Blocked by firewall (playwright.azureedge.net not whitelisted)
✅ File Writing - Created test file successfully
✅ Bash Tool - Verified file content

Status: PARTIAL PASS (3/4 tests passed)

cc @Mossaka @copilot

AI generated by Smoke Copilot