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>

bootstrap.sh

@@ -42,6 +42,8 @@ echo working dir: $PWD
 
 # exit 0
 
-tar cvf - $(cat "$PWD/file-list" | grep -v '^#') | (cd "$here" && tar xvf -)
+tar cvf - $(cat "$PWD/file-list" | grep -v '^#') | (cd "$here" && tar xf -)
 
 echo "$ref" > .diachron-version
+
+echo "Now, run the command ./sync.sh"