a3785a6ec6
Ratifies the m37 milestone-fieldtest concern: the guide recommended a once-per-bar trigger without saying whether bars_since_open depends on it. It does not — the index is clock-derived (ctx.now()), so a denser trigger stream (raw m1 price, as the shipped corpus wires it) emits the same per-bar index more often. The once-per-bar wiring is a convention for one-emission-per-bar, not a correctness requirement.