Build effect cost maps from PowActionCostInfo.cfg

PowersManager._effect_costMaps now comes from PowActionCostTemplate
instead of static_effect_costmaps. Parity (scripts/p45.py, dev DB):
524/524 ids, 522 identical. Value changes, cfg wins (D2, user
decision 2026-10-26):
- PRE-092 Yglandor: Sulfur 1 -> 6
- PRE-097 Jagged: adds Sulfur 1

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

src/engine/server/world/WorldServer.java

@@ -593,7 +593,7 @@ public class WorldServer {
         ReSpawner.start();
 
         Logger.info("Loading effect cost maps");
-        DbManager.EffectsResourceCostsQueries.LOAD_ALL_COSTMAPS();
+        PowersManager.loadEffectCostMaps();
 
         Logger.info("Starting ForgeManager thread");
         ForgeManager.start();