🛡️ Sentinel: [CRITICAL] Fix hardcoded token bypass in Nginx config

[Snider]

🚨 Severity: CRITICAL
💡 Vulnerability: Hardcoded secret token xrpc-9f8e7d6c5b4a used as an $arg_token check to bypass the block on /xmlrpc.php.
🎯 Impact: An attacker could extract the token from version control and perform brute-force or DDoS attacks against the XML-RPC endpoint, or trigger internal Nginx functionality.
🔧 Fix: Removed the conditional token bypass logic and replaced it with an unconditional deny all; directive for /xmlrpc.php.
✅ Verification: Ensure Nginx configuration is syntactically correct and curl -I https://<host>/xmlrpc.php?token=xrpc-9f8e7d6c5b4a returns a 403 Forbidden. I have also added an entry to .jules/sentinel.md outlining the findings and mitigation.

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PR created automatically by Jules for task 1292392308713627196 started by @Snider

[google-labs-jules]

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