ci: improve PR deployment workflow and labeling (#3842)

# Description of Changes

- Updated the labeler rules in `.github/labeler-config-srvaroa.yml` to
support optional scope (e.g., `feat(api):`) for all conventional commit
prefixes.
- Added broader matching for API-related PRs by including `swagger` and
`api` keywords in title matching.
- Introduced a new `pr-deployed` label in `.github/labels.yml` to
indicate that a PR has been deployed to a test environment.
- Enhanced the `PR-Demo-Comment-with-react.yml` workflow:
- Replaced `create-github-app-token` with a local `setup-bot` action to
standardize GitHub App auth.
  - Added logic to automatically label deployed PRs with `pr-deployed`.
  - Added cleanup logic for temporary files after workflow execution.
- Improved the `PR-Demo-cleanup.yml` workflow:
- Triggered now on `pull_request_target` instead of `pull_request` for
better permission context.
- Automatically removes the `pr-deployed` label and any bot-generated
deployment comment when a PR is closed.
  - Added proper GitHub App auth handling via `setup-bot`.
- Ensured conditional cleanup only occurs if relevant artifacts are
present.

try:
https://github.com/Stirling-Tools/Stirling-PDF/security/code-scanning/240

---

## Checklist

### General

- [x] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [x] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md)
(if applicable)
- [x] I have performed a self-review of my own code
- [x] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md#6-testing)
for more details.

.github/workflows/PR-Demo-cleanup.yml

@@ -1,7 +1,7 @@
 name: PR Deployment cleanup
 
 on:
-  pull_request:
+  pull_request_target:
     types: [opened, synchronize, reopened, closed]
 
 permissions:
@@ -13,11 +13,11 @@ env:
 
 jobs:
   cleanup:
+    if: github.event.action == 'closed'
     runs-on: ubuntu-latest
     permissions:
-      contents: write
       pull-requests: write
-    if: github.event.action == 'closed'
+      issues: write
 
     steps:
       - name: Harden Runner
@@ -25,13 +25,84 @@ jobs:
         with:
           egress-policy: audit
 
+      - name: Checkout PR
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+
+      - name: Setup GitHub App Bot
+        if: github.actor != 'dependabot[bot]'
+        id: setup-bot
+        uses: ./.github/actions/setup-bot
+        continue-on-error: true
+        with:
+          app-id: ${{ secrets.GH_APP_ID }}
+          private-key: ${{ secrets.GH_APP_PRIVATE_KEY }}
+
+      - name: Remove 'pr-deployed' label if present
+        id: remove-label-comment
+        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
+        with:
+          github-token: ${{ steps.setup-bot.outputs.token }}
+          script: |
+            const prNumber = ${{ github.event.pull_request.number }};
+            const owner = context.repo.owner;
+            const repo = context.repo.repo;
+
+            // Hole alle Labels auf dem PR
+            const { data: labels } = await github.rest.issues.listLabelsOnIssue({
+              owner,
+              repo,
+              issue_number: prNumber
+            });
+
+            const hasLabel = labels.some(label => label.name === 'pr-deployed');
+
+            if (hasLabel) {
+              console.log("Label 'pr-deployed' found. Removing...");
+              await github.rest.issues.removeLabel({
+                owner,
+                repo,
+                issue_number: prNumber,
+                name: 'pr-deployed'
+              });
+            } else {
+              console.log("Label 'pr-deployed' not found. Nothing to do.");
+            }
+
+            // Find existing comment
+            const comments = await github.rest.issues.listComments({
+              owner,
+              repo,
+              issue_number: prNumber
+            });
+
+            const deploymentComments = comments.data.filter(c =>
+              c.body?.includes("## 🚀 PR Test Deployment") &&
+              c.user?.type === "Bot"
+            );
+
+            if (deploymentComments.length > 0) {
+              for (const comment of deploymentComments) {
+                await github.rest.issues.deleteComment({
+                  owner,
+                  repo,
+                  comment_id: comment.id
+                });
+                console.log(`Deleted deployment comment (ID: ${comment.id})`);
+              }
+            } else {
+              console.log("No matching deployment comments found.");
+            }
+            core.setOutput('present', hasLabel || deploymentComment ? 'true' : 'false');
+
       - name: Set up SSH
+        if: steps.remove-label-comment.outputs.present == 'true'
         run: |
           mkdir -p ~/.ssh/
           echo "${{ secrets.VPS_SSH_KEY }}" > ../private.key
           sudo chmod 600 ../private.key
 
       - name: Cleanup PR deployment
+        if: steps.remove-label-comment.outputs.present == 'true'
         id: cleanup
         run: |
           ssh -i ../private.key -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -T ${{ secrets.VPS_USERNAME }}@${{ secrets.VPS_HOST }} << 'ENDSSH'
@@ -57,3 +128,11 @@ jobs:
               echo "NO_CLEANUP_NEEDED"
             fi
           ENDSSH
+
+      - name: Cleanup temporary files
+        if: always()
+        run: |
+          echo "Cleaning up temporary files..."
+          rm -f ../private.key
+          echo "Cleanup complete."
+        continue-on-error: true