ci: bump actions/checkout from 4 to 7

.github/workflows/build-image.yml

@@ -25,7 +25,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - uses: docker/setup-buildx-action@v4
       - name: Build image (no push)
         uses: docker/build-push-action@v7

.github/workflows/ci.yml

@@ -99,7 +99,7 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - uses: astral-sh/setup-uv@v5
         with:
           enable-cache: true
@@ -109,7 +109,7 @@ jobs:
   typecheck:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - uses: astral-sh/setup-uv@v5
         with:
           enable-cache: true
@@ -122,7 +122,7 @@ jobs:
       matrix:
         python-version: ["3.13"]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - uses: astral-sh/setup-uv@v5
         with:
           enable-cache: true
@@ -132,7 +132,7 @@ jobs:
     name: changelog
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
         with:
           fetch-depth: 0
       - name: Require a CHANGELOG entry

.github/workflows/docs.yml

@@ -19,7 +19,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
       - uses: astral-sh/setup-uv@v5
       - name: Build site in strict mode (fail on broken nav or links)
         run: uv run --with mkdocs-material mkdocs build --strict

.github/workflows/secrets.yml

@@ -14,7 +14,7 @@ jobs:
   gitleaks:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
         with:
           fetch-depth: 0
       - uses: gitleaks/gitleaks-action@v3