Run spec-verify on this project.

Project state:

• scripts/check-spec-links.sh exists and is executable
• scripts/check-target-ownership.sh exists and is executable
• scripts/build-spec-manifest.py exists
• specs/auth.spec.md exists with valid [@test] annotations pointing to existing files
• tests/auth/test_login.py exists
• src/auth.py exists
• The project uses pytest (pytest.ini is present)
• The git working tree is clean

All checks are expected to pass.