Brummel
132dee2437
Cycle 2 of the World/C21 milestone (#166): `aura sweep <blueprint.json> --axis <name>=<csv>` sweeps a loaded signal over its named param-space axes, reusing the existing stage1-r sweep machinery with the signal source swapped to cycle-1's wrap_stage1r seam, aggregating to a FamilyKind::Sweep family; each member manifest carries the shared topology_hash. Derivable extension, not a fork (recon + grounding confirm): the sweep is by-name param-space-driven (SweepBinder.axis / resolve_axes / bootstrap_with_cells), so a loaded blueprint's param_space slots in; wrap_stage1r nests an arbitrary signal; append_family is blueprint-agnostic. Scoped to sweep (the keystone family); MC / walk-forward over a loaded blueprint are the same machinery per verb and follow as a fast follow-on. Decisions recorded on #166. Boss-signed on a grounding-check PASS: all six load-bearing current-behaviour assumptions ratified by named green tests (wrap_stage1r arbitrary-signal nesting, the by-name param-space sweep, stage1_r_sweep_family, append_family/FamilyKind::Sweep, topology_hash, the .json-discriminator dispatch precedent). refs #166