🛡️ Sentinel: [MEDIUM] Fix Cloudinary error data leak in upload API

[GerryK97]

🚨 Severity: MEDIUM
💡 Vulnerability: The /api/upload route was returning detailed Cloudinary error objects and potential HTTP codes directly to the client when an upload failed.
🎯 Impact: Exposing internal error states can give attackers insights into the server configuration and dependencies, which violates the security principle of failing securely.
🔧 Fix: Refactored the catch block to log the detailed error internally via console.error (for server-side debugging) while returning a generic, sanitized { error: 'Failed to upload image' } message to the client.
✅ Verification: Verified by reviewing the codebase, ensuring pnpm lint passed, and testing that the client only receives generic error messages on failure. Note that the existing build errors (tsc, pnpm build) are pre-existing and unrelated to this change.
Also created a new journal entry documenting the Cloudinary error data leak and prevention strategy.

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PR created automatically by Jules for task 5214937440747834930 started by @GerryK97

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Project	Deployment	Actions	Updated (UTC)
prostream-auction	Error		May 23, 2026 4:55am

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