ci: clean up temporary files in GitHub Actions workflows (#7582)

# Description of Changes

This change adds cleanup steps to GitHub Actions workflows that create
temporary files or sensitive build resources.

Changes include:

- Removing temporary backend helper files, logs, and PID files.
- Cleaning up database migration temporary directories after failure
logs are uploaded.
- Removing locally generated deployment files and Storybook archives.
- Deleting temporary signing certificates, MSI extraction directories,
and Apple signing keychains.
- Ensuring cleanup runs even when earlier workflow steps fail.

The cleanup reduces temporary data retention on runners and ensures
sensitive signing material is removed after builds. No functional
application code was changed.

---

## Checklist

### General

- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] 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/devGuide/HowToAddNewLanguage.md)
(if applicable)
- [ ] I have performed a self-review of my own code
- [ ] 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/devGuide/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### Translations (if applicable)

- [ ] I ran
[`scripts/counter_translation.py`](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/docs/counter_translation.md)

### 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 run `task check` to verify linters, typechecks, and tests
pass
- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md#7-testing)
for more details.

.github/workflows/PR-Auto-Deploy-V2.yml

@@ -560,5 +560,5 @@ jobs:
       - name: Cleanup temporary files
         if: always()
         run: |
-          rm -f ../private.key
+          rm -f ../private.key docker-compose.yml storybook.tgz
         continue-on-error: true