ctrlrun.InMemoryStateStore — class, defined at src/ctrlrun/state.py:579
ctrlrun demo.
Nothing here survives the process, and nothing here is shared between processes, so this
store cannot provide the cross-process half of SPEC-v0.1 §5.3 E1 — SQLiteStateStore is
the store for anything that matters. Within one process it refuses exactly what SQLite
refuses: the same plan_reservation and check_consumable decide, under one lock that
covers each whole check-and-write.