Use v2 image tag to force K8s to pull updated image

K8s caches :latest tag. Using :v2 ensures the permission-fixed
image is pulled instead of the cached old one.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

nextflow.config

@@ -3,7 +3,7 @@ docker {
 }
 
 process {
-    container = 'harbor.cluster.omic.ai/omic/chai1:latest'
+    container = 'harbor.cluster.omic.ai/omic/chai1:v2'
     memory = '32 GB'
     cpus = 4
 }