Use spec-ci-sync to update the CI workflow for this project.

Project state:

• pytest.ini is present (the project uses pytest)
• .spec-source-manifest.json exists and lists these test files:
  • tests/auth/test_login.py
  • tests/auth/test_rate_limit.py
• .github/workflows/spec-verification.yml already exists with an outdated test step

Expected behaviour: detect pytest, collect the spec-declared test files, generate the updated workflow, show a diff of what will change, ask for confirmation before overwriting, then write the file.