Identify time gaps

[mgm3746]

Flag log lines where the time gap exceeds a specified interval.

For example, if the interval is 10 seconds, it would identify lines 2 and 3 below, as there is an 11-second gap between them:
2023-06-01 12:42:32,760 WARN log line1
2023-06-01 12:42:42,760 WARN log line2
2023-06-01 12:42:53,760 WARN log line3
2023-06-01 12:42:54,760 WARN log line4

This could be used to identify bottleneck events and also periods of time when the application is not busy.