Add SSH scan support with BSI TR-02102-4 compliance

- SSH scanning via ssh-audit (KEX, encryption, MAC, host keys)
- BSI TR-02102-4 and IANA compliance validation for SSH
- CSV/Markdown/reST reports for SSH results
- Unified compliance schema and database views
- Code optimization: modular query/writer architecture

README.md

@@ -93,11 +93,15 @@ Updates IANA registry data from official sources. Default database contains IANA
 
 **Direct TLS**: HTTPS, LDAPS, SMTPS, IMAPS, POP3S
 
+**SSH**: SSH (Port 22)
+
 ## Compliance Standards
 
 - BSI TR-02102-1: Certificate requirements
 - BSI TR-02102-2: TLS cipher suites and parameters
+- BSI TR-02102-4: SSH key exchange, encryption, MAC and authentication methods
 - IANA TLS Parameters: Cipher suites, signature schemes, supported groups
+- IANA SSH Parameters: Key exchange, encryption, MAC and compression algorithms
 
 ## Documentation