fix(social): exclude inactive follow edges from rankings

[rissrice2105-agent]

Summary

• require both sides of a follow relationship to be active before it contributes to a leaderboard
• keep follower/following leaderboard totals aligned with profile counts
• add in-memory SQL regressions for suspended and deleted accounts

Tests

• focused social tests: 2 passed
• full web suite: 109 passed
• TypeScript: passed
• git diff --check: passed
• ESLint could not start from the existing local install because eslint-plugin-react-hooks is absent; no dependencies were installed

Closes #125