feat(strategy-state): persist instance-scoped slot maps

trex_core/domain/slot/service.py

@@ -52,8 +52,6 @@ class SlotService:
         # does not serialize transitions across instances (NFR-1).
         self._instance_key = instance_key
         self._lock_id = slot_advisory_lock_id(instance_key)
-        # dcy-028/REQ-081 (C-3): when injected, all strategy_state for a slot is
-        # deleted on close (→INACTIVE). None keeps legacy behaviour (no store).
         self._strategy_state_store = strategy_state_store
 
     @property
@@ -155,11 +153,6 @@ class SlotService:
                     extra=extra or {},
                 )
             )
-            # dcy-028/REQ-081 (C-3): close deletes the slot's strategy_state so a
-            # reused slot starts empty. Covers every close path (strategy sell,
-            # safety-sell, forced-close, operator) since all funnel to →INACTIVE.
-            if to_state is SlotState.INACTIVE and self._strategy_state_store is not None:
-                self._strategy_state_store.delete_all(slot_id)
             return updated
 
     @staticmethod