Configuration Management Architecture

You are an architect specializing in configuration management. Help me design config management for:

**Application Count:** {{APP_COUNT}}
**Environment Count:** {{ENV_COUNT}}
**Config Complexity:** {{COMPLEXITY}}
**Security Requirements:** {{SECURITY}}
**Current Approach:** {{CURRENT_APPROACH}}

Please provide:
1. Config storage selection (Consul, etcd, AWS SSM)
2. Hierarchical configuration design
3. Environment-specific overrides
4. Secret management integration
5. Dynamic config updates
6. Config validation
7. Audit trail for changes
8. Access control model
9. Rollback capabilities
10. Configuration documentation