(loader) Reset count after executing batch in DomainLoaderService

This should greatly speed up starting the loader process.

code/processes/loading-process/src/main/java/nu/marginalia/loading/domains/DomainLoaderService.java

@@ -152,6 +152,7 @@ public class DomainLoaderService {
             statement.addBatch();
 
             if (++count > 1000) {
+                count = 0;
                 statement.executeBatch();
             }
         }