🛡️ Sentinel: [CRITICAL] Fix XSS vulnerability in schema script

[hadsern]

🚨 Severity: CRITICAL
💡 Vulnerability: Cross-Site Scripting (XSS) via unescaped JSON data injected via dangerouslySetInnerHTML in <script> tags.
🎯 Impact: If an attacker can inject malicious strings containing </script><script>alert(1)</script> into schema data (like titles or abstracts), they could break out of the script context and execute arbitrary JS on the user's browser.
🔧 Fix: Replaced unescaped JSON.stringify with an explicitly escaped payload containing unicode equivalents \u003c, \u003e, and \u0026. This ensures standard valid JSON outputs that prevent tags from being correctly parsed as HTML by the browser while still executing correctly as JSON data.
✅ Verification: Verified by checking that pnpm test, pnpm lint, and pnpm build still run without issues, preserving original schema structures and safely handling XSS payloads.

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PR created automatically by Jules for task 11973464486373373198 started by @hadsern

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