Function execute_single_query

Execute a single query with streaming output. Args: message_handler: Message handler instance session: Session object query: Query to execute output_mode: Output mode (summary/detail/raw) output_dir: Output directory for files data_source: Optiona

(
    message_handler: MessageHandler,
    session,
    query: str,
    output_mode: str = "summary",
    output_dir: Optional[Path] = None,
    data_source: Optional[DataSource] = None,
    process_log_handler: Optional[StructuredLogHandler] = None
)