Convert CachedConstructor to record

Converts the internal CachedConstructor class to use Java 17 records,
reducing boilerplate and improving memory layout. Updates all getter
method calls to use record accessors.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: oschwald

src/main/java/com/maxmind/db/CachedConstructor.java

@@ -3,37 +3,10 @@
 import java.lang.reflect.Constructor;
 import java.util.Map;
 
-final class CachedConstructor<T> {
-    private final Constructor<T> constructor;
-    private final Class<?>[] parameterTypes;
-    private final java.lang.reflect.Type[] parameterGenericTypes;
-    private final Map<String, Integer> parameterIndexes;
-
-    CachedConstructor(
-        Constructor<T> constructor,
-        Class<?>[] parameterTypes,
-        java.lang.reflect.Type[] parameterGenericTypes,
-        Map<String, Integer> parameterIndexes
-    ) {
-        this.constructor = constructor;
-        this.parameterTypes = parameterTypes;
-        this.parameterGenericTypes = parameterGenericTypes;
-        this.parameterIndexes = parameterIndexes;
-    }
-
-    Constructor<T> getConstructor() {
-        return this.constructor;
-    }
-
-    Class<?>[] getParameterTypes() {
-        return this.parameterTypes;
-    }
-
-    java.lang.reflect.Type[] getParameterGenericTypes() {
-        return this.parameterGenericTypes;
-    }
-
-    Map<String, Integer> getParameterIndexes() {
-        return this.parameterIndexes;
-    }
+record CachedConstructor<T>(
+    Constructor<T> constructor,
+    Class<?>[] parameterTypes,
+    java.lang.reflect.Type[] parameterGenericTypes,
+    Map<String, Integer> parameterIndexes
+) {
 }

src/main/java/com/maxmind/db/Decoder.java

@@ -410,10 +410,10 @@ private <T> Object decodeMapIntoObject(int size, Class<T> cls)
                 )
             );
         } else {
-            constructor = cachedConstructor.getConstructor();
-            parameterTypes = cachedConstructor.getParameterTypes();
-            parameterGenericTypes = cachedConstructor.getParameterGenericTypes();
-            parameterIndexes = cachedConstructor.getParameterIndexes();
+            constructor = cachedConstructor.constructor();
+            parameterTypes = cachedConstructor.parameterTypes();
+            parameterGenericTypes = cachedConstructor.parameterGenericTypes();
+            parameterIndexes = cachedConstructor.parameterIndexes();
         }
 
         Object[] parameters = new Object[parameterTypes.length];