Event-driven Flower runtime. EventWorker -> EventFlow -> EventStep. A reactor-pattern event loop where steps declare what should wake them (events, external signals, deadlines) instead of being re-ticked. Reuses flower-core primitives (EventBus, Clock, FlowId, ExecutionContext, FlowState). Java 8 compatible. No reactive-streams (Mono/Flux) API.

Bridges Bloom event bus to the Flower core EventBus SPI. Java 8 compatible.

Event-driven approval-wait backend for controlled action runtime execution.

JDBC checkpoint store for Flower event-loop durable checkpoint/resume flows. Java 8 compatible.