725545cbde
Task-by-task plan for spec 0081: the ConstantCost node (aura-std), the summarize_r scalar->cost-stream change (the workspace-wide call-site migration as one compile-gate task), and the run-path wiring (net_r_equity tap + --cost-per-trade) — RED-first per task. Scoped to the run path (non-reduce); sweep/walkforward/mc pass None this cycle. refs #148