refactor(engine): ♻️ Improve async data loading and event dispatch efficiency in DataLoader and EventBus

Co-Authored-By: Lilith Autocommit <noreply@atlilith.com>

src/game/engine/src/autoloads/data_loader.gd

@@ -290,6 +290,11 @@ func get_wilds_config() -> Dictionary:
 func get_villages_config() -> Dictionary:
 	return _get_entry("villages", "villages")
 
+func get_fauna_species(species_id: String) -> Dictionary:
+	var wilds: Dictionary = get_wilds_config()
+	var creature_loot: Dictionary = wilds.get("creature_loot", {})
+	return creature_loot.get(species_id, {})
+
 func get_npc_building_type(type_id: String) -> Dictionary:
 	return _get_entry("npc_buildings", type_id)
 

src/game/engine/src/autoloads/event_bus.gd

@@ -63,6 +63,7 @@ signal item_produced(city: Variant, item_id: String)
 ## pattern documented by mc-city::production.
 signal item_crafted(item_id: String, city: Variant, player: Variant)
 ## Emitted when the civ-wide material stockpile changes (add or consume).
+signal loot_dropped(player: Variant, creature_type: String, drops: Array)
 signal stockpile_changed(player: Variant, resource_id: String, delta: int, total: int)
 ## Emitted when the Treasury crosses the 20-item soft cap. Informational only —
 ## adds are never blocked. UI should show a subtle hint, not a modal.