Load and analyze a Markdown document from a file path.
        
        Args:
            document_path: Path to the Markdown file (supports absolute, relative, and ~ expansion)
            validation_level: Validation strictness - "STRICT", "NORMAL", or "PERMISSIVE"
        

        Insert a new section at a specified location.
        The document will be saved after the operation if successful and auto_save is True.
        

        Delete a section by ID or heading.
        The document will be saved after the operation if successful and auto_save is True.
        

        Update the content of an existing section.
        The document will be saved after the operation if successful and auto_save is True.
        

        Get a specific section by ID.
        
        Args:
            document_path: Path to the Markdown file
            section_id: The section ID to retrieve
            validation_level: Validation strictness - "STRICT", "NORMAL", or "PERMISSIVE"
        

        List all sections in the document.
        
        Args:
            document_path: Path to the Markdown file
            validation_level: Validation strictness - "STRICT", "NORMAL", or "PERMISSIVE"  
        

        Move a section to a different position.
        The document will be saved after the operation if successful and auto_save is True.
        

        Get the complete document content and structure.
        
        Args:
            document_path: Path to the Markdown file
            validation_level: Validation strictness - "STRICT", "NORMAL", or "PERMISSIVE"
        

        Save the document (mainly for validation purposes since auto_save handles most cases).
        
        Args:
            document_path: Path to the source Markdown file
            target_path: Path to save to (if different from source)
            backup: Whether to create a backup before saving
            validation_level: Validation strictness - "STRICT", "NORMAL", or "PERMISSIVE"
        

        Analyze document structure and provide insights.
        
        Args:
            document_path: Path to the Markdown file
            validation_level: Validation strictness - "STRICT", "NORMAL", or "PERMISSIVE"