fix(ci): run the recorder's macOS tests in the native dev shell

The step ran `cargo nextest` in `nix develop`, whose default shell exports
CARGO_BUILD_TARGET=x86_64-pc-windows-msvc for the Windows cross build. On the
macOS runner that made cargo build the recorder's test executables for Windows,
and nextest then failed to list them:

  for `komorebi-recorder::assert`, command `.../target/x86_64-pc-windows-msvc/debug/deps/assert-ce31ab528bf795df.exe --list --format terse`
  exited with exit code 126 ... cannot execute binary file

Use `nix develop .#native`, the shell without the cross environment that exists
for exactly these `cargo -p komorebi-<platform>` commands. The schemas step
keeps the default shell: `just jsonschema` runs cargo through `env -u
CARGO_BUILD_TARGET`. docs/dev/ci.md notes the shell.

.github/workflows/_macos.yaml

@@ -31,11 +31,12 @@ jobs:
       - name: The macOS checks
         run: nix build -L --no-link .#checkSets.macos-lint .#checkSets.macos-test .#checkSets.macos-options
       # the recorder's tests of the macOS sources (oslog, av, capture, platform, power, system state): the
-      # filterset is tools/test-partition's
+      # filterset is tools/test-partition's. It runs in the native shell: the default one exports
+      # CARGO_BUILD_TARGET=x86_64-pc-windows-msvc, and nextest cannot list the tests of a Windows .exe on a Mac
       - name: The recorder's macOS tests
         run: |
           # shellcheck disable=SC2016
-          nix develop --command bash -c 'cargo nextest run --locked -p komorebi-recorder -E "$(tools/test-partition expr recorder-macos)"'
+          nix develop .#native --command bash -c 'cargo nextest run --locked -p komorebi-recorder -E "$(tools/test-partition expr recorder-macos)"'
       - name: The binaries
         run: |
           nix build -L --no-link --print-out-paths .#komorebi .#komorebic .#komorebi-bar |

docs/dev/ci.md

@@ -27,7 +27,7 @@ each is `success` or `skipped`: it is the only check a ruleset needs to require.
 | 3 | `test` (4 legs) | ubuntu-24.04, nix | `checkSets.{linux-test,windows-test,recorder-test,nixgen-test}`: Linux tests, the Windows test executables cross-built (not run), the recorder's and nixgen's tests | always |
 | 3 | `windows-native-test` | windows-latest | `cargo nextest` of the `windows` and `os_sensitive` classes of `tools/test-partition` | Windows or shared paths |
 | 3 | `windows-native-test-arm` | windows-11-arm | the same on ARM | label `ci:win-arm`; a push to master with Windows paths; by hand |
-| 3 | `macos-hosted` | macos-latest (`_macos.yaml`) | the macOS checks, the recorder's macOS tests, the binaries, the schemas | macOS paths |
+| 3 | `macos-hosted` | macos-latest (`_macos.yaml`) | the macOS checks, the recorder's macOS tests (in `nix develop .#native`: the default shell builds for Windows), the binaries, the schemas | macOS paths |
 | 4 | `discover`, `vm-fast` | ubuntu-24.04, KVM | the fast tier of the KDE VM suites, one machine each (`max-parallel: 8`, 45 minutes), a machine with no KVM drawn again (`_vm.yaml`, see KVM) | Linux paths; label `ci:vm`; every push to master |
 
 Beside the ladder: