Fix main CI: commit ferric Cargo.lock and pin macOS CMake (#374)

* ferric-example: commit Cargo.lock to pin the Rust toolchain deps

CI resolved Rust dependencies fresh on every run because Cargo.lock was
gitignored (a leftover from the initial `cargo new --lib` scaffolding in
#43 — the stock library-crate convention). That let `napi-derive-backend`
float to 5.1.2, which expands the `#[napi]` attribute macro into a broken
`ctor` `unify_features` invocation ("expected `(`, found `]`"), failing the
bootstrap build of every CI job that compiles ferric-example.

ferric-example is a `crate-type = ["cdylib"]` that builds a final `.node`
artifact, not a library published to crates.io, so committing Cargo.lock is
the recommended practice — the direct analogue of package-lock.json. The
committed lock pins napi-derive-backend 5.0.2 (last known-good). Verified
with `cargo build --locked`.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* ci: pin CMake on macOS unit tests

The macos-latest runner now ships CMake 4.2.x, but the project pins
CMAKE_VERSION 4.1.2 (matching the React Native template and the version
used by the test-macos / Android SDK jobs). The unit-tests job did not
pin CMake, so macOS builds picked up the incompatible runner default.
Install the pinned version via jwlawson/actions-setup-cmake, mirroring
the test-macos job, gated to macOS runners.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UCN2h9xbyn4yhxfVZyMzAm

---------

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: kraenhansen

.github/workflows/check.yml

@@ -92,6 +92,12 @@ jobs:
         with:
           packages: tools platform-tools ndk;${{ env.NDK_VERSION }}
       - run: rustup target add x86_64-linux-android aarch64-linux-android armv7-linux-androideabi i686-linux-android aarch64-apple-ios-sim
+      # macOS runners ship a newer CMake than the project supports; pin it to match the version used elsewhere in CI
+      - name: Install compatible CMake version
+        if: runner.os == 'macOS'
+        uses: jwlawson/actions-setup-cmake@v2
+        with:
+          cmake-version: ${{ env.CMAKE_VERSION }}
       - run: npm ci
       - run: npm run bootstrap
       - run: npm test

packages/ferric-example/.gitignore

@@ -1,5 +1,4 @@
 /target
-Cargo.lock
 
 /*.xcframework/
 /*.apple.node/