// Package worker provides the app-blind process-local control loop shared by
// durable workers and derived-state reconcilers.
//
// The package deliberately owns no queue schema, business state, claim token,
// lease, retry, or effect disposition. Those facts remain with the domain
// source. The controller only decides when a source receives an activation to
// reconcile or claim work and bounds how many already-claimed attempts execute
// concurrently.
package worker