test(analytics): comprehensive tests for analytics module #3298
Description
Context
Phase 4 PostHog — depends on all analytics issues.
What
- Unit tests: mock posthog-node, verify all service methods
- Integration tests: middleware captures requests correctly, identify/groupIdentify triggered on auth/org flows
- E2E tests: full request flow with analytics middleware active
- All tests use mocked posthog-node (no external dependency)
Acceptance criteria
- Unit tests for analytics.service (track, identify, groupIdentify, shutdown)
- Unit tests for featureFlags.service (isEnabled, getVariant, local eval, fallback)
- Integration tests for auto-capture middleware
- Integration tests for identify on signup/login
- Integration tests for groupIdentify on org create/update/plan change
- Coverage thresholds maintained