Make onboarding identity ledger explicit

[shaypal5]

Summary

• sort onboarding identities by newest request first so recent approved/pending rows stay visible
• add pending/approved/suspended/total counts above the onboarding list
• show a clear no-pending message while keeping approved and suspended identities listed below

Verification

• npm run check
• npm run test
• npm run build

Live data check

• production database currently has 4 agent identities and 0 pending identities: data@govil-scraper, dev@community-map, dev@thinking-teams, dev@general