feat(idaa): use URL g_uuid for Jitsi moderator group check

Instead of checking membership across all groups in novi_idaa_group_guid_li
(site config), pass the single g_uuid from the URL param. Each Novi iframe
page supplies the group relevant to that specific meeting, so checking just
that one group is both more precise and avoids unnecessary Novi API calls.

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

src/routes/idaa/(idaa)/video_conferences/+page.ts

@@ -4,6 +4,7 @@ export function load({ url }) {
     return {
         params: {
             uuid: url.searchParams.get('uuid'),
+            g_uuid: url.searchParams.get('g_uuid'),
             email: url.searchParams.get('email'),
             full_name: url.searchParams.get('full_name'),
             moderator: url.searchParams.get('moderator'),