🛡️ Sentinel: [HIGH] Fix SSRF in Website Verification Service

[Pmaster-dev]

🚨 Severity: HIGH
💡 Vulnerability: Server-Side Request Forgery (SSRF) in WebsiteVerificationService
🎯 Impact: Attackers could submit local loopback addresses (127.0.0.1, localhost), private IP subnets (10.x, 172.16-31.x, 192.168.x), or Cloud metadata endpoints (169.254.169.254) to scan internal services or extract sensitive cloud credentials.
🔧 Fix: Added URL scheme and hostname validation (isSafeUrl) in WebsiteVerificationService to reject non-public and private/internal IP addresses before performing HTTP GET requests.
✅ Verification: Added unit tests in server/services/WebsiteVerificationService.test.ts verifying that loopback addresses, AWS metadata, and private IP ranges are rejected.

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PR created automatically by Jules for task 7898723389904156116 started by @Pmaster-dev

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