The dashboard's Personal Numbers card now accepts a group (stored as
"@GroupName", unambiguous against a same-named numeric extension) as well
as a plain extension. A group-owned DID rings every CURRENT member whose
own tier/approved-numbers authorize the caller, computed fresh on every
call by a generated pstn-personal-group-ring.sh (invoked via the
dialplan's SHELL() function) rather than unrolled at install time, since
group membership can change any time via the dashboard with no reinstall
- unlike the shared ring-group, which is fixed at install/update time.
Applies the identical per-member permission check the shared ring-group
already bakes into the dialplan, just computed in a plain shell loop
against the same two config files - group ownership doesn't bypass the
tier/approved-numbers model. Tested standalone against mock config data
(full/restricted/internal mix, matching/non-matching caller, empty and
nonexistent groups) - all four cases behaved correctly. The dialplan's own
SHELL() invocation is still unverified against a real call.
Group ownership never touches pstn-permissions.conf's personal_did
(outbound Caller-ID override) field, since there's no single extension to
hang that on for a group.