Add comment explaining static field skip in clone()

Author: hectorcast-db

databricks-sdk-java/src/main/java/com/databricks/sdk/core/DatabricksConfig.java

@@ -996,6 +996,7 @@ private DatabricksConfig clone(Set<String> fieldsToSkip) {
       if (fieldsToSkip.contains(f.getName())) {
         continue;
       }
+      // Skip static fields (e.g. LOG) — they are shared across instances and cannot be set.
       if (java.lang.reflect.Modifier.isStatic(f.getModifiers())) {
         continue;
       }