Method add_execution_pin

src/core/node.py:750–752

Add an execution pin for flow control.

(self, name, direction)

        return pin

    def add_execution_pin(self, name, direction):
        """Add an execution pin for flow control."""
        return self.add_pin(name, direction, "exec", "execution")

    def add_data_pin(self, name, direction, pin_type_str):
        """Add a data pin for value transfer."""