fix: Bagit LTS adapter fails if target directory is a symlink.

cdstar-runtime/src/main/java/de/gwdg/cdstar/runtime/lts/bagit/BagitTarget.java

@@ -106,8 +106,11 @@ public class BagitTarget implements LTSTarget, RuntimeListener {
 
 	@Override
 	public void onStartup(RuntimeContext ctx) throws Exception {
-		Files.createDirectories(path);
-		Files.createDirectories(tmpPath);
+		if (!Files.isDirectory(path))
+			Files.createDirectories(path);
+		if (!Files.isDirectory(tmpPath))
+			Files.createDirectories(tmpPath);
+
 		pool = ctx.lookupRequired(PoolService.class).getIOPool(path);
 		cron = ctx.lookupRequired(CronService.class);
 	}