fix: use .primary file for primary detection in LiteFS 0.5

register.sh

@@ -47,7 +47,9 @@ echo "Starting Consul registration loop..."
 LAST_STATE="unknown"
 
 while true; do
-    if /usr/local/bin/litefs is-primary; then
+    # In LiteFS 0.5, .primary file exists ONLY on replicas.
+    # We check /data/.primary because /data is our mount point.
+    if [ ! -f /data/.primary ]; then
         CURRENT_STATE="primary"
     else
         CURRENT_STATE="replica"