tests/determinism.rs runs the same deterministic 200-event history
at thread counts {1, 2, 4, 8} via rayon::ThreadPoolBuilder::install
and asserts every (time, posterior) pair has bit-identical mu and
sigma across all configurations.
Cfg-gated to the rayon feature; no-op under --features approx alone.
Verifies the T3 determinism invariant that the ordered-reduce
strategy (per-slice parallel, sequential sum) produces thread-count-
independent results.
Part of T3.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Anders Olsson
cbf652eb1d