persist_taps_from now filters the tap vocabulary through campaign_run's
own tap_channel classification (exposed pub(crate)) and drops the net
channel: every generated sugar campaign carries an empty cost section by
construction, so net_r_equity was unproducible there and the executor's
skip notice named a remedy (add a cost block to the campaign document)
unreachable from the sweep/walkforward verb. The authored-campaign path
keeps the notice verbatim — there the user wrote the document and the
remedy is reachable. The two full-vocabulary pins move to the producible
subset (deliberate pin move, documented in their doc comments).
closes#240
Brummel
2be6cf8860