Handle pytest “no tests collected” in build workflow

[Copilot]

The build GitHub Actions job fails when pytest exits with code 5 (no tests collected), even though this is not a test failure. This change updates the workflow to treat that case as non-fatal while preserving failure behavior for real pytest errors.

• Workflow behavior change (.github/workflows/python-app.yml)

  • Adjusted the pytest step to allow exit code 5 only.
  • All other non-zero pytest exit codes still fail the job.

• Failure mode addressed

  • Previous behavior:

    pytest

  • Updated behavior:

    pytest || [ $? -eq 5 ]

[fidel147]

Review