Replace echo -e with printf for portable ANSI banners

dash (Debian's /bin/sh) doesn't support echo's -e flag: it prints "-e"
literally as text before processing the rest of the string's backslash
escapes. Every script's colored banner was affected. printf's escape
handling is POSIX-mandated and behaves identically under dash and bash,
so swap all 90 echo -e calls for printf, appending the trailing \n that
echo used to add implicitly.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

bin/postgresqlbackup.sh

@@ -1,12 +1,12 @@
 #!/bin/sh
 
-echo -e '\033[35m
+printf '\033[35m
   ___        _                ___  ___  _      ___          _
  | _ \___ __| |_ __ _ _ _ ___/ __|/ _ \| |    | _ ) __ _ __| |___  _ _ __
  |  _/ _ (_-<  _/ _. | ._/ -_)__ \ (_) | |__  | _ \/ _. / _| / / || | ._ \
  |_| \___/__/\__\__, |_| \___|___/\__\_\____| |___/\__,_\__|_\_\\_,_| .__/
                 |___/                                               |_|
-\033[0m'
+\033[0m\n'
 
 if [ "$(id -u)" -ne 0 ]; then
   echo "Please run as root"