fix(cli): widen progress clear to 80 chars to avoid leftover "rows" text

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: dfa1

cli/src/main/java/io/github/dfa1/vortex/cli/ImportCommand.java

@@ -50,7 +50,7 @@ private static void renderProgress(long done, long total) {
     }
 
     private static void clearProgress() {
-        System.err.printf("\r%60s\r", "");
+        System.err.printf("\r%-80s\r", "");
         System.err.flush();
     }