escapement vs qubit-clock vs axess-clock

Deterministic time for multi-threaded synchronous code: a virtual clock that only advances when every participating thread is parked

Thread-safe clock abstractions for Rust: monotonic clocks, mock testing, high-precision time meters, and timezone support

Injectable Clock trait for deterministic simulation testing (DST). Foundational primitive used by axess and adjacent crates: production code depends on the `Clock` trait, tests inject `MockClock` to make time-dependent behaviour reproducible.