Allow Negative Intervals in intervalLengthSum Function

Why it matters

Previously, the intervalLengthSum function only accounted for positive intervals, which limited its use with datasets that contain negative durations or require net interval calculations. Supporting negative intervals allows users to aggregate both positive and negative durations accurately, enhancing time interval analysis capabilities.

How to use it

Simply pass negative interval values as arguments to intervalLengthSum. The function will add the absolute lengths of both positive and negative intervals when computing the sum.