Trip Validity with Max Passengers

A capacity planning service for a ride-sharing platform ingests trip event streams and must validate in real time whether concurrent bookings stay within vehicle capacity limits. Given a list of trip segments, determine whether the schedule is valid. **Input:** A list `trips` of tuples `(start, end, passengers)` and an integer `max_pass` representing the vehicle capacity. **Output:** `True` if at no point in time do concurrent passengers exceed `max_pass`, `False` otherwise. **Key Rules:** - A passenger is aboard during the interval `[start, end)` (end is exclusive). - Multiple trips can overlap in time; their passenger counts are summed. - An empty trip list is always valid.