feat: collect bulk prediction outputs

[vtnphan]

Pull Request

Summary

SBP-368 Adds output collection and score extraction for WISPS bulk prediction workflows (boltz, colabfold), and adds targeted tests to bring CI test coverage above the 90% threshold.

Changes

• app/services/results_utils.py — adds extract_bulk_prediction_max_score (reads PTM scores from S3 CSV) and _make_bulk_prediction_spec, registers bulk-prediction output specs for boltz and colabfold tools
• tests/test_routes_results.py — 5 new tests covering queued-job launch_payload overlay, YAML parse fallback, and get_result_download_all 404/S3 error paths
• tests/test_services_job_utils.py — 2 new tests covering null seqera_run_id skip and ValueError branch in ensure_completed_run_score

How to Test

uv run pytest --cov=app --cov-report=term-missing -q
# Expected: all tests pass, coverage ≥ 90%

Type of change

• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)

Checklist

• I have added tests that prove my fix is effective or that my feature works
• I have added or updated documentation where necessary
• I have run linting and unit tests locally
• The code follows the project's style guidelines

[amandazhuyilan]

Looks good lets go