feat(syncNC): waiting function for psgrep nextcloud

wait 3x20s for nextcloudcmds to finish before exiting

nextcloud/syncNC.sh

@@ -250,6 +250,20 @@ sync_all() {
     return 1
 }
 
+wait_for_nextcloud() {
+    for _ in {1..3}; do
+        if ! pgrep -x "nextcloudcmd" >/dev/null; then
+            return 0
+        fi
+
+        echo "Nextcloud sync is already active, waiting 20 seconds..."
+        sleep 20
+    done
+
+    echo "Nextcloud sync is still active after 3 retries, stopping."
+    return 1
+}
+
 main() {
     parse_args "$@"
     validate_sync_options
@@ -262,11 +276,7 @@ main() {
         die "Cannot read credentials file: $NETRC"
     fi
 
-    if pgrep -x "nextcloudcmd" >/dev/null; then
+    wait_for_nextcloud
-        echo "Nextcloud sync is already active, stopping."
-        return 1
-    fi
-
     echo "Starting Nextcloud synchronization..."
 
     sync_all