Allow one-way delay samples to represent negative values caused by wall-clock skew between client and server. Update CLI output and statistics collection to correctly handle and report these signed durations.
Use wrapping arithmetic instead of checked arithmetic to ensure inter-packet delay variation (IPDV) is correctly calculated when sequence numbers wrap from u32::MAX to 0.
Hide internal fields to improve type safety and provide helper methods for unit conversions and negative value checks. Fix several feature-gated test compilation issues.
Simplify RttSample by merging signed and unsigned fields into a single SignedDuration for adjusted and effective RTT. This ensures accurate reporting and statistics when server processing time exceeds raw RTT.
Simplify the statistics model by merging signed and unsigned duration types into a single structure that uses i128 to consistently handle both positive and negative time offsets.
Rename system_time_ns to unix_time_ns_after_epoch for better clarity on output behavior and update a continuous mode test case name to more accurately reflect its purpose.
Nils Andreas Svee