fix T-ALNS-RRD reproduction fidelity

t_alns_rrd_reproduction/src/problem.py

@@ -147,7 +147,12 @@ class ProblemContext:
         return (self.op_end - self.op_start) / self.n_intervals
 
     def time_to_interval(self, minutes: float) -> int:
-        """Map time in minutes to interval index h ∈ [0, n_intervals-1]."""
+        """Map time to interval h.
+
+        The paper discretizes traffic feeds for 6:00-18:00. Customer windows may
+        extend to 20:00, so departures after the final traffic bucket use
+        hold-last-value semantics instead of extrapolating unobserved traffic.
+        """
         minutes = max(self.op_start, min(minutes, self.op_end - 1))
         return int((minutes - self.op_start) / self.interval_duration)