MedSchools.ai analytics dev implementation reviewed

Implemented and reviewed MedSchools.ai analytics tracking in dev. First-party analytics events write to user_data.analytics_events; Plausible script wiring, admin analytics dashboard rollups, conversion events, and browser Sentry are in place. Verified Supabase project ohkdiwblocbrcfrhxeyg. Local dev /api/analytics inserted a disposable codex_dev_test event, then test rows were deleted. pnpm build passes. svelte-check still fails on existing repo errors but no diagnostics in touched analytics/Sentry files. Server-side Sentry was attempted but backed out because @sentry/sveltekit server integration caused adapter-vercel/@vercel/nft tracing to fail locally with EACCES reading /etc/sudoers. Current pass is browser Sentry only. Worktree includes unrelated/parallel ranking work and Vercel is not linked, so do not blindly push/deploy all local changes as analytics.