🛡️ Sentinel: [HIGH] Fix PII Leak in Feedback Submission

[google-labs-jules]

🚨 Severity: HIGH
💡 Vulnerability: PII (user email) leaked into Sentry global scope on error.
🎯 Impact: Subsequent Sentry events could leak PII.
🔧 Fix: Used a defer block to guarantee cleanup.
✅ Verification: Verified code change and ran tests.

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PR created automatically by Jules for task 13937999350887123148 started by @TytaniumDev

[google-labs-jules]

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