refactor: simplify ChainResolver and RayCaster interfaces, enhance ChainDamageApplier logic

- Updated ChainResolver to remove unused shooterOrigin and shooterDirection parameters, streamlining the resolve method.
- Modified RayCaster interface to reflect changes in method signature, focusing on maxBlocks only.
- Enhanced ChainDamageApplier to utilize a new CauseIndexHolder for resolving the PHYSICAL damage cause index, improving clarity and performance.
- Refactored ChainDamageApplier.apply method to use HytaleEntityAdapter for target references, ensuring correct damage application.
- Adjusted tests in ChainResolverTest and ChainDamageApplierTest to align with the new method signatures and logic.

Tests: All tests passing. Build: ./gradlew clean build successful.

src/main/java/com/mythlane/chainlightning/sceptre/HytaleEntityAdapter.java

@@ -9,6 +9,7 @@ import com.hypixel.hytale.server.core.modules.entitystats.EntityStatValue;
 import com.hypixel.hytale.server.core.modules.entitystats.asset.DefaultEntityStatTypes;
 import com.hypixel.hytale.server.core.universe.world.storage.EntityStore;
 import com.mythlane.chainlightning.chain.ChainEntity;
+import com.mythlane.chainlightning.chain.ChainHit;
 import com.mythlane.chainlightning.chain.Vec3;
 
 import javax.annotation.Nonnull;
@@ -54,6 +55,12 @@ public final class HytaleEntityAdapter implements ChainEntity {
         return new HytaleEntityAdapter(ref, id, vec, alive);
     }
 
+    /** Single cast point so callers stop reaching into ChainEntity to recover the runtime adapter. */
+    @Nonnull
+    public static HytaleEntityAdapter from(@Nonnull ChainHit hit) {
+        return (HytaleEntityAdapter) hit.target();
+    }
+
     /** Underlying Hytale ref, exposed so DamageSystems and EffectControllerComponent can address the entity. */
     @Nonnull
     public Ref<EntityStore> ref() {