ai-dynamo-runtime: Add version 1.5.1

[luhenry]

• Package: ai-dynamo-runtime
• Version: 1.5.1
• Source: https://github.com/ai-dynamo/dynamo
• Docs: https://github.com/ai-dynamo/dynamo

Compiles Dynamo's Rust runtime (dynamo._core, pyo3 abi3) - the CPU-side request plane, KV router and discovery, with CUDA loaded only at runtime and NIXL stubbed exactly as upstream's own wheel is. Upstream publishes no riscv64 wheel.

Mirrors the runtime_wheel_builder stage of upstream's wheel_builder.Dockerfile, same maturin features.

Differs from upstream

• manylinux_2_39_riscv64 image instead of manylinux_2_28
• protoc from Rocky CRB - upstream's protoc release zip has no riscv64 build

Matrix: one abi3 wheel; tested on 3.12/3.13/3.14 (no cp314t: abi3 and pydantic-core).

Testing

• bindings tests selected with upstream's CPU markers (pre_merge and gpu_0)
• NATS and etcd from Ubuntu packages, which the bindings' autouse fixture needs
• test_kserve_grpc.py ignored - needs tritonclient[grpc], which upstream gets from framework images

License: Wheel bundles third-party Rust crate licences, generated by upstream's own bundle_wheel_notices step.

Patches

• 0001-bindings-use-nixl-sys-stub-api-on-riscv64.patch - Inappropriate [nixl-sys get_arch() panics on riscv64 before its stub fallback; real fix belongs in ai-dynamo/nixl]. Riscv64-only.

Built on cp312.