Paper-only, zero capital risk. Fill model: entry at the signal's own recorded
entry_mcap (A4: T+60min market price on delayed entry); exits at live market
mcap on the poll tick that trips the rule; uniform 3% round-trip friction.
Paper fills are NOT proof real chain fills would match — directional
comparison between these 9 books only, run under one identical model.
A promoted paper book is NOT an auto-live decision.