feat: Full Proof — surface realizer join, Rust diffusion parity, benchmark harness
Surface realizer join: pulse output_versor → vault recall → ground_graph fills
<pending> obj slots with recalled words → realize_semantic produces deterministic
sentences. PulseResult replaces bare word list. Every intent type surfaces.
Rust backend parity: unitize_f32 (exponential-map with boost/rotation blade
distinction) and graph_diffusion_step now in core-rs. Python dispatches through
algebra.backend, falls back transparently. 37x speedup on 200-step diffusion.
Benchmark harness (core bench): determinism (100% trace stability), latency
(~150ms median), backend speedup, versor closure audit (0 violations across all
intermediate states), convergence proof (41/45 exact, 4 bounded oscillation),
realizer coverage (8/8 intent types).
Proof property tests (31 tests): Rust/Python parity, pulse determinism across
prompts, V3 convergence for 10+ topologies, coupled V4 output validity, realizer
coverage per intent, versor closure at every intermediate step.
CLI: core pulse, core bench, core test --suite pulse, core test --suite proof.
Fix test_correction_pulls_toward_target (diffuse first, then correct).
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