Cache docvecs to reduce memory footprint

Change-Id: I985b9935b2f7cc41583f93250b8202cdcd3cd10c
diff --git a/script/cosmasvc2koralquery b/script/cosmasvc2koralquery
index 2e20568..4c3e5b0 100755
--- a/script/cosmasvc2koralquery
+++ b/script/cosmasvc2koralquery
@@ -13,7 +13,7 @@
 # 2024-07-17
 #   Add KorAP::Def.
 
-our $VERSION = 0.2;
+our $VERSION = 0.3;
 our @ARGV;
 
 my $cmd = shift @ARGV;