🛡️ Sentinel: [security improvement] Add security headers to API responses

[crabcanon]

🚨 Severity: MEDIUM
💡 Vulnerability: Missing security headers on API responses.
🎯 Impact: The API is missing standard defense-in-depth headers, such as HSTS, X-Frame-Options, and X-Content-Type-Options, which can expose the application to potential MIME-sniffing, clickjacking, and lack of enforced HTTPS for subdomains.
🔧 Fix: Appended Strict-Transport-Security, X-Frame-Options, and X-Content-Type-Options headers inside request_context_middleware.
✅ Verification: Ensure tests pass. The end-to-end functionality continues to run perfectly.

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PR created automatically by Jules for task 10835625129495743378 started by @crabcanon

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Project	Deployment	Actions	Updated (UTC)
cortex	Ready	Preview, Comment	Jul 25, 2026 8:13pm