plan: 0107 campaign executor
10 tasks, strictly sequential: walk_forward vocabulary correction
(research + cli twins, workspace-green per task), engine ListSpace,
registry campaign-run store + visibility promotions, aura-campaign
crate (scaffold/types, preflight, execute sweep+gate, walk-forward
stage via byte-exact stub replacement), CLI verb + MemberRunner driver,
seam tests + gated real-data e2e, #196 on-ramp verbs.
Drafted per-task against the live tree, seam-reconciled (task 6/7
signature + module home unified; scaffold dead-code allowances dropped
by the task that consumes them), self-reviewed per the planner
checklist (no placeholders, single-filter test gates, compile-gate
ordering honoured via partial -p gates in task 1).
refs #198, refs #196
Brummel
0cc1858d86