Suppress duplicate tar output in bootstrap and upgrade scripts

Verbose on the sending tar, quiet on the receiving tar, so the
file list prints once.

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

upgrade.sh

@@ -88,7 +88,7 @@ for f in "${old_files[@]}"; do
 done
 
 # Copy in new framework files
-(cd "$tmpdir/diachron" && tar cf - "${new_files[@]}") | (cd "$DIR" && tar xf -)
+(cd "$tmpdir/diachron" && tar cvf - "${new_files[@]}") | (cd "$DIR" && tar xf -)
 
 # Stage them
 for f in "${new_files[@]}"; do