F437 static and generated-artifact checks

python3 -m py_compile: passed
python3 -m ruff check: passed
technology index --check: passed
SVG XML parse and PNG 2160x1350 dimensions: passed
git diff --check: passed

The checked Python set includes the controller, realtime stream, persistent
backend, QueryStore, service parser, multi-rank evaluator/runner/oracles,
delivery verifier, generator, and affected tests.