build(deps): bump actions/checkout from 4.4.0 to 7.0.1

Bumps [actions/checkout](https://github.com/actions/checkout) from 4.4.0 to 7.0.1.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v4.4.0...3d3c42e5aac5ba805825da76410c181273ba90b1)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: 7.0.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/python-ci.yml

@@ -68,7 +68,7 @@ jobs:
     name: Wheel + parity tests (features=sota)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1
         with:
           # The python/ crate path-deps v2/crates/* and (transitively via
           # train) the vendored ruvector submodule — recursive checkout keeps
@@ -133,7 +133,7 @@ jobs:
     name: Default wheel <= 5 MiB (ADR-117 §5.4)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1
         with:
           submodules: recursive