[HANDOFF] AI Gateway Endpoint — Unified LLM Management

**Priority:** 🟡 P1 | **Sessions:** 0.5 | **Phase:** 3

**Handoff file:** riefings/handoffs/ai-gateway-endpoint-2026-05-28.md

**Scope:** Single LLM management point with caching, rate limiting, cost tracking. Route all QWAV Workers AI calls through Gateway.

**Status:** ⬜ READY — Awaiting Projects Agent pickup