Module control 

Control messages for node and engine management.

This module defines messages used to control node lifecycle and modify pipeline graphs at runtime:

• NodeControlMessage: Messages sent to individual nodes to update parameters or control execution
• EngineControlMessage: Messages sent to the engine to modify the pipeline graph
• ConnectionMode: How a connection handles backpressure

Enums

ConnectionMode

Specifies how a connection handles backpressure from slow consumers.

EngineControlMessage

A message sent to the central Engine actor to modify the pipeline graph itself.

NodeControlMessage

A message sent to a specific, running node to tune its parameters or control its lifecycle.