feat: enhance logging and message encryption features

- Introduced new logging services: operation logs, login logs, and data change logs.
- Added support for message content encryption in the Message model, including methods for encrypting and decrypting message segments.
- Updated router to include admin log handling and integrated log service for access logging.
- Modified configuration to support encryption settings.

internal/config/config.go

@@ -27,6 +27,7 @@ type Config struct {
 	ConversationCache ConversationCacheConfig `mapstructure:"conversation_cache"`
 	GRPC              GRPCConfig              `mapstructure:"grpc"`
 	Casbin            CasbinConfig            `mapstructure:"casbin"`
+	Encryption        EncryptionConfig        `mapstructure:"encryption"`
 }
 
 // Load 加载配置文件