[cschanhniem]

Summary

• New module: src/openamp_foundry/evidence/benchmark_deprecation.py
• Functions: get_deprecated_cards(), get_active_cards(), build_deprecation_banner() (visible !!! banner), print_all_deprecation_banners() (prints to stdout), check_no_deprecated_in_ranking() (raises DeprecatedBenchmarkError if any card deprecated), deprecation_status_report() (machine-readable status dict)
• DeprecatedBenchmarkError custom exception for governance enforcement
• allow_deprecated=True override for test contexts (requires code-review approval)
• Main registry (5 BMC- cards) confirmed all-active: check_no_deprecated_in_ranking(BENCHMARK_REGISTRY) passes
• 63 tests covering: get_deprecated/active, banner content, check_no_deprecated raises/passes, status report, print banners, integration with registry, edge cases
• BASELINE 6772→6835
• Closes Phase C C8 — deprecated benchmarks can no longer silently retain ranking authority