refactor(openai): improve service initialization and streamline audio transcription handling

- Updated OpenaiService and related classes to enhance the initialization process by ensuring the correct order of parameters.
- Simplified audio message handling by consolidating transcription logic and improving error handling.
- Refactored the OpenaiController to utilize the new structure, ensuring better integration with the base chatbot framework.
- Enhanced logging for better traceability during audio processing and API interactions.

src/api/integrations/chatbot/base-chatbot.dto.ts

@@ -39,4 +39,4 @@ export class BaseChatbotSettingDto {
   splitMessages?: boolean;
   timePerChar?: number;
   fallbackId?: string; // Unified fallback ID field for all integrations
-} 
+}