Add dev-only DB/JSON parity check at world boot

ParityCheck compares DB-built objects with the cache JSON and logs
table/id/field differences plus a per-table summary. It runs only when
the optional env var MB_PARITY_CHECK=true is set; it is not added to the
ConfigManager enum because init() aborts on any missing enum entry.

First comparator: static_rune_baseclass name vs RUNE obj_name.
No gameplay values change.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/engine/server/world/WorldServer.java

@@ -34,6 +34,7 @@ import engine.objects.*;
 import engine.parsers.cache.CObjectIndex;
 import engine.parsers.cache.DeedParser;
 import engine.parsers.cache.ItemParser;
+import engine.parsers.cache.ParityCheck;
 import engine.parsers.cache.RuneParser;
 import engine.parsers.objects.DeedTemplate;
 import engine.parsers.objects.RuneTemplate;
@@ -395,6 +396,11 @@ public class WorldServer {
         mbEnums.RaceType.initRaceTypeTables();
         Race.loadAllRaces();
 
+        if (ParityCheck.isEnabled()) {
+            Logger.info("Running DB/JSON parity check");
+            ParityCheck.run();
+        }
+
         Logger.info("Loading building slot/stuck location data.");
         BuildingLocation.loadBuildingLocations();