🛡️ Sentinel: [CRITICAL] Fix exposed credentials.json

[shadowcoder8]

🚨 Severity: CRITICAL
💡 Vulnerability: The credentials.json file, which contains sensitive Google Service Account credentials (including private keys and client IDs), was committed to the repository and tracked by Git.
🎯 Impact: If an attacker gains access to this repository, they would have full access to the Google Service Account and any resources it has permissions for, leading to potential data breaches or unauthorized operations.
🔧 Fix:

• Deleted credentials.json from the repository.
• Added credentials.json to .gitignore to prevent future commits.
• Added a new entry to the Sentinel journal (.jules/sentinel.md) documenting this critical vulnerability and how to prevent it.
  ✅ Verification: Verified the deletion of the file using ls and confirmed the changes to .gitignore and .jules/sentinel.md. Ran the pytest test suite to ensure no regressions were introduced.

---

PR created automatically by Jules for task 15981088321527376980 started by @shadowcoder8

[google-labs-jules]

👋 Jules, reporting for duty! I'm here to lend a hand with this pull request.

When you start a review, I'll add a 👀 emoji to each comment to let you know I've read it. I'll focus on feedback directed at me and will do my best to stay out of conversations between you and other bots or reviewers to keep the noise down.

I'll push a commit with your requested changes shortly after. Please note there might be a delay between these steps, but rest assured I'm on the job!

For more direct control, you can switch me to Reactive Mode. When this mode is on, I will only act on comments where you specifically mention me with @jules. You can find this option in the Pull Request section of your global Jules UI settings. You can always switch back!

New to Jules? Learn more at jules.google/docs.

---

For security, I will only act on instructions from the user who triggered this task.