refactor: fix all compiler + clippy warnings
- analysis.rs: use .clamp() instead of .max().min(), saturating_sub,
inline corner_start into corner_start_s (dead assignment removed)
- binary_utils.rs, parser_pcars.rs: use std::array::from_fn for array reads
- recording.rs: std::io::Error::other() instead of Error::new(ErrorKind::Other),
#[allow(dead_code)] on diagnostic methods (len, total_pushed, dropped_count, ring_stats)
- track_model.rs: prefix unused path vars with _, #[allow(dead_code)] on exists()
- parser_ksudp.rs: fix doc list item indentation
- session.rs: std::mem::take instead of mem::replace(..., Default::default())
cargo build: 0 warnings, clippy: 0 warnings, 33 tests pass