bug: timeleft formula mismatch

[zuoxingdong]

Training:

(1.0 - (pl.col("tick") / pl.col("max_tick"))).alias("timeleft")

max_tick = maximum tick value (e.g., 143 for 0-indexed 144 ticks)
At tick 143: timeleft = 1 - 143/143 = 0.0

Evaluation

time_left = float(total_ticks - timeStepIndex) / total_ticks

total_ticks = count of timesteps (144)
At tick 143: timeleft = (144-143)/144 = 0.00694

Solution:

# BEFORE:
time_left = float(total_ticks - timeStepIndex) / total_ticks

# AFTER:
time_left = float(total_ticks - 1 - timeStepIndex) / (total_ticks - 1)