feat: wood consumption for patrol and study

Patrol and study now consume 1 wood from the village woodpile on completion, recording an item_consumed economic event. This gives wood a purpose and creates resource pressure between gathering and work-support activities. Familiarity serialization switched from raw Dictionary to sorted Array of {id, score} pairs for deterministic JSON checksum output across save/load.

simulation/state/NPCStateRecord.gd

@@ -46,7 +46,7 @@ static func capture(npc: SimNPC) -> NPCStateRecord:
 			"last_task": String(npc.last_task),
 			"random_seed": str(npc.random_source.seed),
 			"random_state": str(npc.random_source.state),
-			"familiarity": npc.familiarity.duplicate(true)
+			"familiarity": _sorted_familiarity(npc.familiarity)
 		}
 	)
 
@@ -162,10 +162,26 @@ func restore(debug_logs: bool) -> SimNPC:
 	npc.random_source.state = String(data["random_state"]).to_int()
 	npc.debug_logs = debug_logs
 	var saved_familiarity = data.get("familiarity", {})
-	if saved_familiarity is Dictionary:
+	if saved_familiarity is Array:
+		for pair in saved_familiarity:
+			var pair_dict: Dictionary = pair
+			npc.familiarity[int(pair_dict["id"])] = float(pair_dict["score"])
+	elif saved_familiarity is Dictionary:
 		npc.familiarity = saved_familiarity.duplicate(true)
 	return npc
 
 
 func to_dictionary() -> Dictionary:
 	return data.duplicate(true)
+
+
+static func _sorted_familiarity(familiarity: Dictionary) -> Array:
+	var pairs: Array[Dictionary] = []
+	for key in familiarity:
+		pairs.append({"id": int(key), "score": float(familiarity[key])})
+	pairs.sort_custom(_familiarity_sort)
+	return pairs
+
+
+static func _familiarity_sort(a: Dictionary, b: Dictionary) -> bool:
+	return int(a["id"]) < int(b["id"])