ci(e2e-stand): pass --build, the flag that replaced --build-backend

[ktursunov]

Summary

#2455 replaced test-stand up --build-backend with --build in dev-compose.sh but left the workflow passing the old flag at both call sites, so up exits 2 (unknown test-stand up option: --build-backend) before the stand starts — both stand lanes fail for any PR whose diff touches src/backend/. First observed on #2463's PR run.

Validation

• grep -n 'build-backend' .github/workflows/e2e-stand.yml → no remaining call sites (comments updated too)
• git show origin/main:dev-compose.sh accepts --build and no longer accepts --build-backend

Summary by CodeRabbit

• Chores
  • Updated the end-to-end testing workflow to use the current rebuild option.
  • Revised related workflow guidance to reflect the updated process.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: c46f02fc-0201-4506-beeb-fffb2afe439e

📥 Commits

Reviewing files that changed from the base of the PR and between dcc02e0 and 8a3a08a.

📒 Files selected for processing (1)

• .github/workflows/e2e-stand.yml

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📝 Walkthrough

Walkthrough

The E2E workflow now uses --build instead of the removed --build-backend option for backend rebuilds. Related workflow comments were updated.

Changes

E2E workflow rebuild behavior

Layer / File(s)	Summary
Replace backend rebuild commands .github/workflows/e2e-stand.yml	The workflow comments and API smoke and UI journeys lanes now use --build when backend changes require rebuilding.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Suggested reviewers: cyberantonz

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes replacing the removed --build-backend flag with --build in the e2e-stand workflow.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch ci/e2e-stand-build-flag

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