🛡️ Sentinel: [HIGH] Fix libvips vulnerabilities in sharp

[AstroMyth101]

🚨 Severity: HIGH
💡 Vulnerability: sharp versions <0.35.0 have known vulnerabilities originating in libvips (CVE-2026-33327, CVE-2026-33328, CVE-2026-35590, CVE-2026-35591) which were reported by pnpm audit.
🎯 Impact: Potential exploitation of these vulnerabilities could lead to remote code execution (RCE) or denial of service (DoS) when processing malicious images.
🔧 Fix: Added a pnpm.overrides field in package.json to force the resolution of sharp to a secure version (0.35.3). Updated pnpm-lock.yaml and .jules/sentinel.md journal with learning.
✅ Verification: Verified by running pnpm audit which now reports 0 vulnerabilities, and running pnpm build to ensure the project still builds correctly.

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PR created automatically by Jules for task 12808174257597323717 started by @AstroMyth101

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