feat: add feistyduck.com as tracked resource

[rayketcham]

Feisty Duck as Idea Resource

feistyduck.com — founded by Ivan Ristic (creator of SSL Labs, author of "Bulletproof TLS and PKI"). Monthly security newsletter covering PKI, TLS, post-quantum crypto, CT, and standards evolution.

Should be the first tracked resource in the new resource system. Categories: crypto-infrastructure, rfc-security.

A single newsletter issue (#135) surfaced 5+ concrete project ideas:

• Merkle Tree Certificates
• Encrypted Client Hello
• Trust Anchor Identifiers
• C2PA Certificates
• WebPKI Observatory

Action

• Add via POST /api/resources once dashboard supports it
• Consider auto-scanning newsletter archive for idea seeds

Generated with Claude Code

[rayketcham]

Implemented — feistyduck.com added as seeded tracked resource via seed_resources() with TLS/PKI/security/cryptography categories. Test in test_si_remaining.py.