🛡️ Sentinel: [CRITICAL] Fix PII leakage in Sentry SDK

[google-labs-jules]

🚨 Severity: CRITICAL
💡 Vulnerability: User email was set globally in SentrySDK but could leak to future crash events if the submission threw an error.
🎯 Impact: PII (email address) could be erroneously attached to unrelated crash/error events for the rest of the application's lifecycle.
🔧 Fix: Used a defer block to guarantee SentrySDK.setUser(nil) is executed regardless of whether the async submission succeeds or throws.
✅ Verification: Verified the defer block successfully executes after the async operation in all outcomes.

---

PR created automatically by Jules for task 8761198757756526354 started by @TytaniumDev

[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.