feat: structured narrative event feed with per-NPC inspector timeline

Add narrative event types (task_started, npc_slept, npc_died, resource_depleted) alongside economic transfers. EconomicEventRecord gains create_narrative factory and human-readable description method. SimulationManager records task-start and sleep/death events, exposes get_npc_events() for per-NPC history queries. Inspector now shows a Recent timeline of the last 5 events for the selected NPC, plus displays carried wood count. Relax EconomicEventRecord validation to accept non-economic events. Update roadmap with completed milestones.

simulation/state/EconomicEventRecord.gd

@@ -35,6 +35,30 @@ static func create(
 	)
 
 
+static func create_narrative(
+	event_id: int,
+	event_type: StringName,
+	tick: int,
+	actor_id: int,
+	source_id: StringName,
+	action_display: String = ""
+) -> EconomicEventRecord:
+	return EconomicEventRecord.new(
+		{
+			"schema_version": SCHEMA_VERSION,
+			"event_id": event_id,
+			"event_type": String(event_type),
+			"tick": tick,
+			"actor_id": actor_id,
+			"source_id": String(source_id),
+			"destination_id": "",
+			"item_id": "",
+			"amount": 0.0,
+			"action_name": action_display
+		}
+	)
+
+
 static func from_dictionary(record_data: Dictionary) -> EconomicEventRecord:
 	if int(record_data.get("schema_version", -1)) != SCHEMA_VERSION:
 		return null
@@ -65,10 +89,6 @@ static func from_dictionary(record_data: Dictionary) -> EconomicEventRecord:
 		normalized["event_id"] < 0
 		or normalized["tick"] < 0
 		or normalized["event_type"].is_empty()
-		or normalized["source_id"].is_empty()
-		or normalized["destination_id"].is_empty()
-		or normalized["item_id"].is_empty()
-		or normalized["amount"] <= 0.0
 	):
 		return null
 	return EconomicEventRecord.new(normalized)
@@ -76,3 +96,32 @@ static func from_dictionary(record_data: Dictionary) -> EconomicEventRecord:
 
 func to_dictionary() -> Dictionary:
 	return data.duplicate(true)
+
+
+func description(npc_names: Dictionary = {}) -> String:
+	var actor_name: String = npc_names.get(int(data["actor_id"]), "Someone")
+	var item: String = str(data["item_id"])
+	var amount: float = float(data["amount"])
+	var event_type: String = str(data["event_type"])
+	var source: String = str(data["source_id"])
+	var destination: String = str(data["destination_id"])
+	var action_name: String = str(data.get("action_name", ""))
+	match event_type:
+		"resource_extracted":
+			return "%s gathered %.0f %s from %s" % [actor_name, amount, item, source]
+		"storage_deposited":
+			return "%s deposited %.0f %s into %s" % [actor_name, amount, item, destination]
+		"storage_withdrawn":
+			return "%s withdrew %.0f %s from %s" % [actor_name, amount, item, source]
+		"item_consumed":
+			return "%s consumed %.0f %s" % [actor_name, amount, item]
+		"npc_slept":
+			return "%s slept and recovered energy" % actor_name
+		"npc_died":
+			return "%s died from starvation" % actor_name
+		"task_started":
+			return "%s began %s" % [actor_name, action_name if not action_name.is_empty() else item]
+		"resource_depleted":
+			return "%s was depleted" % source
+		_:
+			return "tick %d: %s" % [int(data["tick"]), event_type]