refactor(adapters): retrait de execution_mode (mensonge structurel)

feat(adapters): migration atomique signature execute() avec RunControl

fix(evaluation): Sprint A14-S25 — Projector retourne (Artifact, payload, report)

feat(app): Sprint A14-S24 — picarones-rewrite run (YAML → bench → HTML bout-en-bout)

feat(sprint-A5): concurrence + perf + lazy reports + corpus de référence