Previously, with dynamic distribution the
benchmark was taking too long

Worker threads now invoke user-supplied `code worker_yield_t::operator()(index_type)` between jobs so real-time audio workloads can tier `code micro_yield()` before falling back to sleeps.

Default worker path now delegates to the configured `code micro_yield_t` instead of hardwiring `code std::this_thread::yield()`, keeping custom wait strategies effective.

Drops the extra template parameter by using `code if constexpr` so worker threads hand their index to `code worker_yield_t` only when that overload exists.

Co-authored-by: Guillaume Riou <griou@sat.qc.ca>
Co-authored-by: Guillaume Riou <117857232+guillaumeriousat@users.noreply.github.com>

The package and its dependencies are outdated.
They don't list compatible Zig versions and the
builds fail even on 0.15.