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

trex_core/application/portfolio.py

@@ -564,7 +564,7 @@ def slot_to_dict(
         "forced_close_at": s.forced_close_at.isoformat() if s.forced_close_at else None,
         "universe_detached": getattr(s, "retired_at", None) is not None,
         # dcy-028/REQ-081 (BAT-042): per-occupancy guard counter — the strategy
-        # daemon echoes this as expected_occupancy_seq on strategy_state writes.
+        # Slot occupancy remains domain state; strategy-state writes do not use it.
         "occupancy_seq": getattr(s, "occupancy_seq", 0),
     }
 
@@ -638,4 +638,3 @@ def _sanitize(message: str) -> str:
             break
     return out[:200]
 
-