Bulk load grids at repop and zone init instead of 2 costly individual selects per NPC, create repositories to decouple database logic from business logic

zone/zone.cpp

@@ -1023,6 +1023,7 @@ bool Zone::Init(bool iStaticZone) {
 
 	LogInfo("Init Finished: ZoneID = [{}], Time Offset = [{}]", zoneid, zone->zone_time.getEQTimeZone());
 
+	LoadGrids();
 	LoadTickItems();
 
 	//MODDING HOOK FOR ZONE INIT
@@ -1610,6 +1611,8 @@ void Zone::Repop(uint32 delay)
 	if (!content_db.PopulateZoneSpawnList(zoneid, spawn2_list, GetInstanceVersion(), delay))
 		LogDebug("Error in Zone::Repop: database.PopulateZoneSpawnList failed");
 
+	LoadGrids();
+
 	initgrids_timer.Start();
 
 	entity_list.UpdateAllTraps(true, true);
@@ -2481,3 +2484,9 @@ void Zone::SetQuestHotReloadQueued(bool in_quest_hot_reload_queued)
 {
 	quest_hot_reload_queued = in_quest_hot_reload_queued;
 }
+
+void Zone::LoadGrids()
+{
+	grids        = GridRepository::GetZoneGrids(GetZoneID());
+	grid_entries = GridEntriesRepository::GetZoneGridEntries(GetZoneID());
+}