chore: pin GitHub Actions to specific commit SHAs

Use pinact to replace mutable tags (e.g. @v1, @v3.3.1) with
immutable full commit SHAs to prevent supply chain attacks from
unintended action updates. Version tags are preserved as inline
comments (e.g. # v6.0.2) for readability.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: julian-risch

.github/workflows/CI_check_api_ref.yml

@@ -10,12 +10,12 @@ jobs:
   test-api-reference-build:
     runs-on: ubuntu-slim
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           fetch-depth: 0
 
       - name: Set up Python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           python-version: "3.13"
 
@@ -101,7 +101,7 @@ jobs:
 
       - name: Set up Node.js
         if: steps.changed.outputs.integrations != '[]'
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
         with:
           node-version: "22"
 

.github/workflows/CI_check_integration_format.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-slim
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Ensure no hyphens
         run: |

.github/workflows/CI_docstring_labeler.yml

@@ -11,7 +11,7 @@ jobs:
 
     steps:
       - name: Checkout base commit
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           ref: ${{ github.base_ref }}
 
@@ -22,7 +22,7 @@ jobs:
         run: cp .github/utils/docstrings_checksum.py "${{ runner.temp }}/docstrings_checksum.py"
 
       - name: Setup Python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           python-version: "3.11"
 
@@ -33,7 +33,7 @@ jobs:
           echo "checksum=$CHECKSUM" >> "$GITHUB_OUTPUT"
 
       - name: Checkout HEAD commit
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           ref: ${{ github.event.pull_request.head.ref }}
           # This must be set to correctly checkout a fork

.github/workflows/CI_docusaurus_sync.yml

@@ -24,10 +24,10 @@ jobs:
 
     steps:
       - name: Checkout this repo
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Set up Python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           python-version: "3.10"
 
@@ -51,7 +51,7 @@ jobs:
         run: hatch run docs
 
       - name: Upload API reference artifact
-        uses: actions/upload-artifact@v7
+        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
         with:
           name: ${{ steps.pathfinder.outputs.integration_name }}
           path: ${{ steps.pathfinder.outputs.project_path }}/${{ steps.pathfinder.outputs.integration_name }}.md
@@ -66,19 +66,19 @@ jobs:
 
     steps:
       - name: Checkout Haystack repo
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           repository: deepset-ai/haystack
           ref: main
           token: ${{ secrets.HAYSTACK_BOT_TOKEN }}
 
       - name: Set up Python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           python-version: "3.10"          
 
       - name: Download API reference artifact
-        uses: actions/download-artifact@v8
+        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
         with:
           name: ${{ needs.generate-api-reference.outputs.integration_name }}
 
@@ -105,7 +105,7 @@ jobs:
           os.remove(artifact_filename)
 
       - name: Create Pull Request
-        uses: peter-evans/create-pull-request@v8
+        uses: peter-evans/create-pull-request@c0f553fe549906ede9cf27b5156039d195d2ece0 # v8.1.0
         env:
           INTEGRATION_NAME: ${{ needs.generate-api-reference.outputs.integration_name }}
         with:
@@ -117,4 +117,4 @@ jobs:
           add-paths: |
             docs-website
           body: |
-            This PR syncs the Core Integrations API reference (${{ env.INTEGRATION_NAME }}) on Docusaurus. Just approve and merge it.
+            This PR syncs the Core Integrations API reference (${{ env.INTEGRATION_NAME }}) on Docusaurus. Just approve and merge it.

.github/workflows/CI_labeler.yml

@@ -10,6 +10,6 @@ jobs:
   triage:
     runs-on: ubuntu-slim
     steps:
-    - uses: actions/labeler@v6
+    - uses: actions/labeler@634933edcd8ababfe52f92936142cc22ac488b1b # v6.0.1
       with:
         repo-token: "${{ secrets.GITHUB_TOKEN }}"

.github/workflows/CI_license_compliance.yml

@@ -33,17 +33,17 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout the code
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Setup Python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           python-version: "${{ env.PYTHON_VERSION }}"
 
       - name: Get changed files (for pull requests only)
         if: ${{ github.event_name == 'pull_request'}}
         id: changed-files
-        uses: tj-actions/changed-files@v47
+        uses: tj-actions/changed-files@24d32ffd492484c1d75e0c0b894501ddb9d30d62 # v47.0.0
         with:
           files_yaml: |
             pyproject:
@@ -71,7 +71,7 @@ jobs:
 
       - name: Check Licenses
         id: license_check_report
-        uses: pilosus/action-pip-license-checker@v3
+        uses: pilosus/action-pip-license-checker@e909b0226ff49d3235c99c4585bc617f49fff16a # v3.1.0
         with:
           github-token: ${{ secrets.GH_ACCESS_TOKEN }}
           requirements: ${{ env.REQUIREMENTS_FILE }}
@@ -80,7 +80,7 @@ jobs:
 
       # We keep the license inventory on FOSSA
       - name: Send license report to Fossa
-        uses: fossas/fossa-action@v1.8.0
+        uses: fossas/fossa-action@c414b9ad82eaad041e47a7cf62a4f02411f427a0 # v1.8.0
         continue-on-error: true # not critical
         with:
           api-key: ${{ secrets.FOSSA_LICENSE_SCAN_TOKEN }}
@@ -91,6 +91,6 @@ jobs:
 
       - name: Notify Slack on nightly failure
         if: failure() && github.event_name == 'schedule'
-        uses: deepset-ai/notify-slack-action@v1
+        uses: deepset-ai/notify-slack-action@3cda73b77a148f16f703274198e7771340cf862b # v1
         with:
-          slack-webhook-url: ${{ secrets.SLACK_WEBHOOK_URL_NOTIFICATIONS }}
+          slack-webhook-url: ${{ secrets.SLACK_WEBHOOK_URL_NOTIFICATIONS }}

.github/workflows/CI_project.yml

@@ -10,7 +10,7 @@ jobs:
     name: Add new issues to project for triage
     runs-on: ubuntu-slim
     steps:
-      - uses: actions/add-to-project@v1.0.2
+      - uses: actions/add-to-project@244f685bbc3b7adfa8466e08b698b5577571133e # v1.0.2
         with:
           project-url: https://github.com/orgs/deepset-ai/projects/5
           github-token: ${{ secrets.GH_PROJECT_PAT }}

.github/workflows/CI_pypi_release.yml

@@ -24,13 +24,13 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           token: ${{ secrets.HAYSTACK_BOT_TOKEN }}
           fetch-depth: 0
 
       - name: Set up Python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           python-version: "3.12"
 
@@ -61,7 +61,7 @@ jobs:
         run: hatch publish -y
 
       - name: Generate changelog
-        uses: orhun/git-cliff-action@v4
+        uses: orhun/git-cliff-action@c93ef52f3d0ddcdcc9bd5447d98d458a11cd4f72 # v4.7.1
         env:
           OUTPUT: "${{ steps.pathfinder.outputs.project_path }}/CHANGELOG.md"
         with:
@@ -71,7 +71,7 @@ jobs:
             --tag-pattern "${{ steps.pathfinder.outputs.project_path }}-v*"
 
       - name: Commit changelog
-        uses: EndBug/add-and-commit@v9
+        uses: EndBug/add-and-commit@a94899bca583c204427a224a7af87c02f9b325d5 # v9.1.4
         with:
           author_name: "HaystackBot"
           author_email: "accounts@deepset.ai"

.github/workflows/CI_stale.yml

@@ -7,9 +7,9 @@ jobs:
   makestale:
     runs-on: ubuntu-slim
     steps:
-      - uses: actions/stale@v10
+      - uses: actions/stale@b5d41d4e1d5dceea10e7104786b73624c18a190f # v10.2.0
         with:
           any-of-labels: 'information-needed'
           stale-pr-message: 'This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 10 days.'
           days-before-stale: 30
-          days-before-close: 10
+          days-before-close: 10

.github/workflows/aimlapi.yml

@@ -40,10 +40,10 @@ jobs:
         working-directory: .
         run: git config --system core.longpaths true
 
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           python-version: ${{ matrix.python-version }}
 
@@ -76,6 +76,6 @@ jobs:
     if: failure() && github.event_name == 'schedule'
     runs-on: ubuntu-slim
     steps:
-      - uses: deepset-ai/notify-slack-action@v1
+      - uses: deepset-ai/notify-slack-action@3cda73b77a148f16f703274198e7771340cf862b # v1
         with:
           slack-webhook-url: ${{ secrets.SLACK_WEBHOOK_URL_NOTIFICATIONS }}