Crate ff_engine 

ff-engine: cross-partition dispatch and background scanners.

Modules

budget

Cross-partition budget check helper.

completion_listener

Push-based DAG promotion dispatch loop (Batch C item 6, issue #9; backend-agnostic refactor in issue #90).

partition_router

Partition-aware dispatch for cross-partition operations.

scanner

Background scanner infrastructure.

supervisor

Scanner supervisor — restarts scanners on panic with backoff.

Structs

Engine

The FlowFabric engine: partition routing + background scanners.

EngineConfig

Engine configuration.