[WIP] Improve challenge61 and optimize Heroku CDS usage

[Copilot]

• Identify failing CI checks
• Fix application.properties: restore `****** that was accidentally removed (fixes test failures, build-preview, DAST ZAP)
• Fix CRLF injection vulnerability in TelegramWebhookController.java (fixes SpotBugs failure)
• Fix version mismatch in Dockerfile and Dockerfile.web (fixes version-check failure)
• CodeQL security check: no alerts found

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[github-actions]

🌐 GitHub Pages Preview Ready!

Your static preview is now available at:
🔗 Preview PR #2439

📄 What's included:

• ✅ All CSS, JavaScript, and static assets (embedded inline)
• ✅ Current styling and layout preview
• ✅ Images, icons, and UI components
• ✅ NEW: Generated HTML from Thymeleaf templates
  • 🏠 Home/Welcome Page
  • ℹ️ About Page
  • 📊 Stats & Config Page
  • 🤖 Challenge 57: LLM Security (Latest)
  • 🧩 Challenge Example

For full functionality testing: Use the Docker preview instead.

🔄 Auto-updates: This preview will be updated automatically when you push new commits to this PR.

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_{Static preview with Thymeleaf generation by GitHub Actions}

[github-actions]

🔨 Preview Build Complete!

Your changes have been built and pushed to GitHub Container Registry.

🐳 Docker Image: ghcr.io/owasp/wrongsecrets/wrongsecrets-pr:pr-2439-a577e5e

📦 Download & Test Locally:

1. 📁 Download Docker Image Artifact (look for wrongsecrets-preview-pr-2439)
2. Load and run the image:

# Download the artifact, extract it, then:
docker load < wrongsecrets-preview.tar
docker run -p 8080:8080 -p 8090:8090 wrongsecrets-preview

🚀 Alternative - Pull from Registry:

docker pull ghcr.io/owasp/wrongsecrets/wrongsecrets-pr:pr-2439-a577e5e
docker run -p 8080:8080 -p 8090:8090 ghcr.io/owasp/wrongsecrets/wrongsecrets-pr:pr-2439-a577e5e

Then visit: http://localhost:8080

📝 Changes in this PR:
- src/main/java/org/owasp/wrongsecrets/challenges/docker/challenge61/TelegramWebhookController.java

Visual diff screenshots will be available shortly...

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_{Preview built by GitHub Actions}

[github-actions]

📸 Visual Diff Ready!

Screenshots comparing your changes with the main branch are available:

📁 Download Visual Diff Artifacts

🖼️ Included screenshots:

• pr-home.png vs main-home.png - Welcome page comparison
• pr-about.png vs main-about.png - About page comparison
• pr-challenge.png vs main-challenge.png - Challenge page comparison

🔍 How to review:

1. Download the artifact zip file
2. Extract and compare the pr-* and main-* images side by side
3. Look for visual differences in layout, styling, and content

💡 Tip: Use an image comparison tool or open both images in separate browser tabs to spot differences easily.

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_{Visual diff generated by GitHub Actions • PR #2439}