Checkpoint: the unlabeled final

No topic, no hints. A 'signal' array is one where every element from index 1 on is **strictly greater** than the previous element. Return the length of the longest contiguous signal segment; an empty array returns 0, a single element counts as a segment of 1. Implement process(int[] arr). Example: {5, 9, 2, 4, 6, 1} → 3 (2,4,6).