Daily Execute Winners Schedule

Configures the in-process daily scheduler that triggers the Execute Winners routine — the terminal-stage job that waits on WIN's select_winners, fetches the latest winners report via ORK proxy, and submits the corresponding buy orders to the brokerage. Time is interpreted in the project's reference timezone (Eastern); MK-7 BUY ran at 11:00 ET each trading day, which is the sensible default to preserve. When "Only on trading days" is on, the scheduled tick first asks the NYSE calendar whether today is a trading day and skips the run on closed days. Allow concurrent execution is forwarded onto every scheduled run; the sizing knobs (buying_power_ratio, max_winners, close_non_winner_positions) live on BUY's Configuration page, not here. The Passive toggle marks this schedule as interruptible — when a non- passive scheduled job's turn comes up while this run is in flight, ORK will cancel this run to make room.