feat: Implement final enterprise modules (Protocol Manager, Master Config)

Completed enterprise platform implementation:

**protocol_manager.adb** (~450 lines):
- SNMP v1/v2c/v3 support with security warnings
- NETCONF server implementation (recommended over SNMP)
- RESTCONF RESTful API support
- gNMI modern gRPC-based protocol
- Prometheus/OpenMetrics metrics export
- Security validation and protocol recommendations
- Firewall and SDP integration
- Protocol statistics and monitoring
- Insecure protocol detection and warnings

**master_config.adb** (~450 lines):
- 5 deployment profiles (Development, Staging, Production, Honeypot, Research)
- Configuration validation with security checks
- Security posture reporting
- Configuration file operations (INI, YAML, JSON)
- Hot reload without restart
- Migration from legacy config
- Configuration comparison and diffing
- Emergency configurations (lockdown, recovery, minimal)
- Production security enforcement

All 6 enterprise modules now complete:
- dns_records_extended (500 lines)
- firewall_manager (460 lines)
- security_headers (500 lines)
- sdp_controller (470 lines)
- protocol_manager (450 lines)
- master_config (450 lines)

Total: ~2,830 lines of enterprise infrastructure code

Author: claude