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

[crabcanon]

🚨 Severity: LOW
💡 Vulnerability: The API responses lacked basic security headers like Strict-Transport-Security, X-Content-Type-Options, and X-Frame-Options.
🎯 Impact: Missing these headers leaves the application susceptible to basic client-side attacks such as MIME-type sniffing and clickjacking, and does not enforce HTTPS connections for clients.
🔧 Fix: Added the security headers to the request_context_middleware in the FastAPI application to ensure they are returned on all HTTP responses.
✅ Verification: The API E2E tests pass, verifying that the new headers do not break API functionality.

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PR created automatically by Jules for task 12480272365767341352 started by @crabcanon

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Project	Deployment	Actions	Updated (UTC)
cortex	Ready	Preview, Comment	Jul 21, 2026 9:24pm