Harness 0.16.5

Added

• Added the in-repo TraceCLR algorithm profile, derived from the product C#
  corpus, with deterministic compatibility checks, an explicit binary wire
  boundary, and a trace-capable minimal runner used as evidence for the
  optimized execution tier.

Changed

• C# prepared execution now selects either the optimized algorithm runner or
  the broad compatibility runner before learner code starts. The selected
  tier never falls through to the other runner after a learner failure, and
  both tiers preserve the same output, tracing, limits, and isolation
  contracts.
• Browser runtime prewarming now begins as promotable idle work. A foreground
  compile promotes the same pending work instead of starting a second warmup.
• C++ toolchain asset loading, integrity validation, PCH registration, and
  compiler initialization now stay inside the compiler Worker. Python runtime
  image fetching and Wasm compilation likewise run in a short-lived bootstrap
  Worker before the immutable image is retained at provider scope.

Fixed

• Prevented Python and C++ preflight from blocking the browser page thread
  during Practice loading while preserving fast warmed first execution.