New leaf library crate: the campaign-execution semantics home (#198
home decision — reusable beyond the CLI; NOT C21's project-side
World). CellSpec + the MemberRunner seam (the only thing a consumer
implements), MemberFault/ExecFault (Display-free, prose at the binary
seam), member_metric over the 14 per-member scalars (third roster
site, refs #190 — drift fails safe as a preflight refusal), and
preflight: v1 pipeline shape std::sweep [std::gate]* [std::walk_forward],
rankable-metric and gate-metric rosters, plateau-in-wf and
deflate+plateau refusals, i64-fit guard on wf lengths — all before any
member runs.
Post-loop: the held quality finding (untested i64-fit arm) verified
real and closed by hand — preflight_refuses_wf_length_exceeding_i64.
Gates: aura-campaign 14/0, clippy -D warnings clean.
refs #198
Brummel
3a4f1c4597