v1.9.0-rc.54

Release candidate for v1.9.0.

Fixed

• java: NativeLib loader RID aligned to go_java_platform() naming (macos-arm64, linux-aarch64, windows-x86_64); fixes UnsatisfiedLinkError on macOS arm64 clients.
• elixir: rustler NIF Cargo.toml now emits [features] default = ["config", "download", "serde"] forwarding to the core crate; fixes :nif_not_loaded on every Native.download/*, cache_dir/0, clean_cache/0, init/0, configure/1, downloaded_languages/0 call.
• node: vitest testTimeout raised 30 s → 60 s; clears smoke_devicetree + smoke_ocamllex first-load timeouts.
• e2e/c: download_ffi.sh honours ALEF_FFI_LOCAL_DIR env override to skip the GH release download; ci-e2e.yaml/test-c-ffi now reuses the build-ffi artifact, breaking the 404 race on new releases.

Changed

• Bumped alef pin 0.25.20 → 0.25.24.

See CHANGELOG.md for details.