Cycle 0066, reference issue #133. Settled design (deferred from 0065): make SQN
the single-number objective for ranking a Stage-1 sweep family by R signal
quality.
Two halves:
- aura-registry: metric_cmp learns sqn / expectancy_r / net_expectancy_r (all
higher-is-better, reaching into RunReport.metrics.r); a member with r:None sorts
to the worst position. No persistence change (the family store already carries r).
- aura-cli: --strategy stage1-r sweeps the stage1-r harness over a fast×slow signal
grid (stop & sizing fixed — risk_budget is R-invariant, bias.scale is sign-only
for flat-1R, both degenerate axes; the stop defines the R unit so varying it
breaks cross-member SQN comparability — see the #133 decision log). The stage1-r
topology is extracted into a shared helper so the single run keeps its identical
binding (output unchanged by construction) and only the sweep floats fast/slow.
Signed under /boss via the grounding-check PASS (the autonomous signature). The
first grounding pass BLOCKed a false claim that the stage1-r single-run output was
already byte-pinned; the spec was revised so a golden characterization test is
added against current HEAD before the refactor (verifying byte-preservation rather
than assuming it), and re-grounded to PASS.
refs #133#117
Brummel
1c8678a6ad