Per-fight totals

Both corners: knockdowns, significant/total strikes, takedowns, submission attempts, reversals, control time, and target/position splits (head/body/leg, distance/clinch/ground) where the source provides them. Each line carries corner (a = the bout's fighter_a, b = fighter_b) beside the stored fighter_position (1/2). distance_time_sec, clinch_time_sec, ground_time_sec (integers, nullable) are seconds spent at distance / in the clinch / on the ground, and can appear alongside official strike counts on any org (position time is filled in even where the rest of the row comes from the official stats).