v0.10.1-beta — Channel-parallel graph path (multicore)

Performance

Channel-parallel graph evolve

• ADR-0184 D3: evolve_batched and batched adjoint now split channels across cores via std::thread::scope
• Gated behind parallel feature (C≥2); each worker has its own ScratchPool
• Graph Krylov ML path was previously single-threaded (parallel feature only covered Strang2D/3D grid kernels)
• Bit-identical to serial (0-ULP; forward + ascending-index gradient reduction per ADR-0184 D4/D5)
• Measured ~5–6× on i7-12700K (612–1942% CPU)
• Closes the "speed" half of the memory↔speed contradiction for graph diffusion / SSM layers

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See CHANGELOG.md for full technical details and gate validation.