TapChannel gains Net; tap_channel routes the full closed vocabulary
(producibility moved to the caller); the trace path drains the sixth
channel and persists the cost-adjusted net curve. A cost-less document
requesting net_r_equity keeps a skip notice, reworded to name the
remedy (add a cost block) — not a refusal. Two deliberate pin moves:
the absence pin re-pins to routed, the skip-notice e2e re-pins to the
reworded form. Post-review: positive write-path e2e added (a costed
GER40 campaign lands net_r_equity.json with the curve differing from
r_equity by the accrued costs).
Verified: routing pin + positive e2e green (real archive), full
workspace suite green, clippy -D warnings clean.
refs #234
Brummel
da7d54774b