StationReassemble typedef
One reassemble verb, as the host sees it: a callback returning the wire body of what the re-composition DID.
This typedef is the SEAM that lets grid_exploration host a grid_sdk
affordance without depending on grid_sdk — the package's dependency set
is unchanged, and ADR-0002's dependency direction (nothing points back at the
SDK) holds. A station wires GridHandle.hotReload / hotRestart in; this
package only ever sees a Future<Map> Function().
Implementation
typedef StationReassemble = Future<Map<String, Object?>> Function();