do not use static string compressor in upload handlers

performanceDb/src/main/java/org/lucares/performance/db/PerformanceDb.java

@@ -231,6 +231,10 @@ public class PerformanceDb implements AutoCloseable {
         return fields;
     }
 
+    public DataStore getRealDataStore() {
+        return dataStore;
+    }
+
     public PartitionDiskStore getDataStore() {
         return dataStore.getDiskStorage();
     }