$ pda set url@vt https://example.com
$ fecho tmpval hello world
$ pda set greeting@vt < tmpval
$ pda set number@vt 42
$ pda ls vt --value "**world**" --format tsv
Key	Value	TTL
greeting	hello world (..1 more chars)	no expiry
$ pda ls vt --value "**https**" --format tsv
Key	Value	TTL
url	https://example.com	no expiry
$ pda ls vt --value "*" --format tsv
Key	Value	TTL
number	42	no expiry
$ pda ls vt --value "**nomatch**" --> FAIL
FAIL  cannot ls '@vt': no matches for value pattern '**nomatch**'