Function execute_continuation_sync 

pub fn execute_continuation_sync<F>(
    continuation: &WorkflowContinuation,
    input: Bytes,
    execute_task: &F,
) -> Result<Bytes, RuntimeError>
where
    F: Fn(&str, Bytes) -> Result<Bytes, BoxError>,

Execute a workflow continuation synchronously.

This is useful for environments that don’t support async (like Python with GIL). Branches are executed sequentially.

Arguments

• continuation - The workflow continuation to execute
• input - Input bytes for the first task
• execute_task - Callback to execute a task: (task_id, input) -> Result<output>

Errors

Returns an error if task execution fails.