🛡️ Sentinel: [MEDIUM] Add baseline security headers

[crabcanon]

🚨 Severity: MEDIUM
💡 Vulnerability: The API responses are missing baseline security headers (X-Content-Type-Options, X-Frame-Options, Strict-Transport-Security). This exposes the API to MIME sniffing, clickjacking, and man-in-the-middle downgrade attacks.
🎯 Impact: Browsers interacting with the API (e.g., via Swagger UI or custom clients) might be tricked into rendering content maliciously or bypassing secure connections, leading to potential data exposure.
🔧 Fix: Added X-Content-Type-Options: nosniff, X-Frame-Options: DENY, and Strict-Transport-Security: max-age=31536000; includeSubDomains headers to all responses in the global request_context_middleware.
✅ Verification: Run pytest tests to ensure no functionality is broken. Check API responses manually to see the headers.

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PR created automatically by Jules for task 2176807862671595991 started by @crabcanon

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Project	Deployment	Actions	Updated
cortex	Ready	Preview	Sep 19, 2026 7:48pm UTC

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