Processing steps

Route steps that are not Enterprise Integration Patterns. They handle body materialization, method invocation, and flow control. These are route-building utilities, not named patterns from Hohpe and Woolf.

• Stream Cache — materialize a stream body into bytes so later steps can re-read it
• Bean — call a registered Rust function as a route step
• Stop — halt the pipeline without raising an error

For the route structure that hosts these steps, see Routes and pipelines.