fix(proof): regenerate ADR-134 CIR witness hash after CIR fixes

Rust Workspace Tests failed the CIR determinism guard: expected
120bd7b1… (from the original ADR-134, #837) vs actual 304d5469…. The
later CIR fixes on this branch (windowed dominant-tap ratio, λ tuning,
causal-delay-window rms — ADR-134 P2) intentionally changed the
CirEstimator output but never regenerated the witness hash.

The new output is bit-deterministic and cross-platform stable: the Rust
cir_proof_runner produces 304d5469… on both Linux CI and local Windows.
Regenerated via the sanctioned `--generate-hash` path; verify-cir-proof.sh
now prints "VERDICT: PASS (CIR hash matches)".

Co-Authored-By: claude-flow <ruv@ruv.net>