fix: Fix insert inferred partition not writing to partition folder

Author: xieandrew

ice/src/main/java/com/altinity/ice/cli/internal/cmd/Insert.java

@@ -526,7 +526,13 @@ private static List<DataFile> processFile(
               partitionKey));
     } else {
       // Table isn't partitioned or sorted. Copy as is.
-      String dstDataFile = dstDataFileSource.get(file);
+      String dstDataFile;
+      if (partitionSpec.isPartitioned() && partitionKey != null) {
+        // File has inferred partition, use partition path
+        dstDataFile = dstDataFileSource.get(partitionSpec, partitionKey, file);
+      } else {
+        dstDataFile = dstDataFileSource.get(file);
+      }
       if (checkNotExists.apply(dstDataFile)) {
         return Collections.emptyList();
       }