- #8: Remove hardcoded credentials, require env vars (YK_ROOT_PIN, YK_INT_PIN, ADMIN_PASSWORD, JWT_SECRET)
- #11: JWT secret now random via secrets.token_hex(32) if not set
- #12: Admin password from env var, not hardcoded
- #14: XSS prevention - sanitize error messages, html.escape
- #15: CSRF tokens on all forms
- #16: Cookie Secure flag added
- #7: datetime.utcnow() → datetime.now(timezone.utc)
- #3: Temp files in tempfile.mkdtemp, cleaned after use
- #22: Private keys via cryptography library (NoEncryption for now)
- #26: DER construction via cryptography library
- #27: CRL table added for certificate revocation
- #29: WAL autocheckpoint enabled
- #30: Caddyfile already has TLS (no change needed)
- #6: .gitignore for .password, *.pem, *.key
