chore(deps): bump actions/checkout from 4 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -37,7 +37,7 @@ jobs:
           --health-timeout 5s
           --health-retries 5
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: actions/setup-go@v5
         with:
@@ -95,7 +95,7 @@ jobs:
       run:
         working-directory: web
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: actions/setup-node@v4
         with:
@@ -126,7 +126,7 @@ jobs:
           - image: export-worker
             file: Dockerfile.export-worker
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: docker/setup-buildx-action@v3
 
       - name: Build ${{ matrix.image }}

.github/workflows/copilot-setup-steps.yml

@@ -27,7 +27,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       # ── Go toolchain ──────────────────────────────────────────
       - name: Set up Go

.github/workflows/docs.yml

@@ -32,7 +32,7 @@ jobs:
       name: github-pages
       url: ${{ steps.deployment.outputs.page_url }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
 

.github/workflows/helm-ci.yml

@@ -28,7 +28,7 @@ jobs:
     name: Lint Chart
     runs-on: ${{ inputs.runner || 'arc-runner' }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
@@ -64,7 +64,7 @@ jobs:
     name: Template Validation
     runs-on: ${{ inputs.runner || 'arc-runner' }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: azure/setup-helm@v4
         with:
@@ -105,7 +105,7 @@ jobs:
     name: Schema Validation
     runs-on: ${{ inputs.runner || 'arc-runner' }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: azure/setup-helm@v4
         with:
@@ -128,7 +128,7 @@ jobs:
     runs-on: ${{ inputs.runner || 'arc-runner' }}
     if: github.event_name == 'pull_request'
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
 

.github/workflows/perf.yml

@@ -19,7 +19,7 @@ jobs:
       run:
         working-directory: web
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: actions/setup-node@v4
         with:

.github/workflows/release.yml

@@ -39,7 +39,7 @@ jobs:
       version: ${{ steps.bump.outputs.version }}
       is_prerelease: ${{ steps.bump.outputs.is_prerelease }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
@@ -126,7 +126,7 @@ jobs:
             build-args: |
               VERSION=${{ needs.version-tag.outputs.new_tag }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: docker/setup-buildx-action@v3
 
       - name: Log in to GHCR
@@ -179,7 +179,7 @@ jobs:
       contents: read
       packages: write
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Install Helm
         uses: azure/setup-helm@v4
@@ -202,7 +202,7 @@ jobs:
     if: ${{ !cancelled() && needs.docker.result == 'success' && needs.helm.result == 'success' }}
     runs-on: ${{ inputs.runner || 'arc-runner' }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
 

.github/workflows/security.yml

@@ -22,7 +22,7 @@ jobs:
     name: Security Scan
     runs-on: ${{ inputs.runner || 'arc-runner' }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: actions/setup-go@v5
         with: