Await Statsig initialize during app startup before evaluating any gate or config. Treat pre-init evaluations as unknown, not as false. Add a readiness check that blocks traffic until the first config fetch completes.

Context: Official docs (Statsig server Node SDK): initialize performs a network request, and only after it completes are SDK operations synchronous. Gates are always closed/off, returning false, by default. Agents that evaluate a gate before initialize resolves get false for every user, which looks like the gate is broken or the rollout is at zero. The fix is awaiting initialize at startup before serving traffic.

## Matched source
Source: Published skill
Original query: "Statsig gates return false until initialize finishes its fetch"
Key terms: false, fetch, finishes, gates, initialize, return, statsig, until