refactor(server): decouple services and improve architecture

- Introduce interfaces for all major services (JWT, PostAI, Comment, Message, Notification, QRCodeLogin, Upload, Vote, etc.) to support dependency inversion.
- Move query parameters from `internal/dto` to a new `internal/query` package to separate request payloads from data transfer objects.
- Refactor `internal/router` to use embedded `RouterDeps` for cleaner dependency management.
- Decouple handlers from repositories by injecting services instead of direct repository access, ensuring proper layering.
- Improve database initialization by moving it from `internal/model` to `internal/database`.
- Optimize message decryption by implementing a more efficient `BatchDecrypt` method in `MessageEncryptor` using a worker pool.
- Enhance error handling and security by implementing fail-fast checks for encryption key length during startup.
- Clean up unused code, including the `avatar` package and several unused DTOs.

internal/handler/livekit_handler.go

@@ -34,7 +34,7 @@ func NewLiveKitHandler(
 		liveKitService: liveKitService,
 		callService:    callService,
 		config:         &cfg.LiveKit,
-		logger:          logger,
+		logger:         logger,
 	}
 }
 
@@ -163,4 +163,4 @@ func (h *LiveKitHandler) handleRoomFinished(ctx context.Context, event *livekit.
 			zap.Error(err),
 		)
 	}
-}
+}