* feat(gateway): Jev (System One) as primary text moderator with LLM fallback
Add TypeSafe Jev via @typesafe-ai/sdk v0.6.0 as the PRIMARY analyzer for
text-only moderation sub-batches; the existing LLM stays as the fallback
for anything Jev cannot decide confidently (per-message gate rejection or
API failure) and for media batches.
- jevAnalyzer.ts: TypeSafeClient wrapper, declarative state builder
(System One models MUST get factual state, not chat-XML — chat framing
made Jev confidently wrong on clean messages at 0.98 confidence),
message-id-keyed question builder (5 typed questions per message),
cross-consistency acceptance gate (noul↔status↔severity↔action↔category),
answer→AnalysisResult mapper, fail-open outcome.
- textBatchProcessor.ts: Jev-first per sub-batch, rejected ids + API
failures fall back to callModerationLLM; no cross-batch pollution.
- config: AI_LLM_JEV_ENABLED/API_KEY/BASE_URL/MODEL/TIMEOUT_MS/MIN_CONFIDENCE.
- .env.example: documented all 6 Jev env vars.
- tests: unit (question/state builders, gate, mapper) + live smoke
(gated behind AI_LLM_JEV_SMOKE=1) verified 4/4 accepted vs real 9router.
* fix: auto-fix code quality [skip ci]
asepharyana