get https://api.voicecreator.ai/api/v1/knowledge-files/
Get a specific knowledge file by ID.
Parameters: knowledge_file_id (int): The ID of the knowledge file to retrieve request (Request): The FastAPI request object db (AsyncSession): The database session organization_id (Optional[int]): The organization ID from the API key
Returns: KnowledgeFile: The requested knowledge file
Raises: HTTPException: - 400: If organization ID is missing - 404: If the knowledge file is not found or not accessible - 500: If an unexpected error occurs during retrieval