docs(plan): Plan-B-Insta — insta-render Windows worker + NAS 분할
16 task, 5 phase. NAS insta-lab의 Playwright Chromium 100% Windows로 이전.
Phase 1 (NAS 수신부): verify_internal_key + /api/internal/insta/update
+ main.py에 redis client + docker-compose env (Task 1-4)
Phase 2 (Windows worker 신설): web-ai/services/insta-render Docker
컨테이너 (Dockerfile, requirements, card_renderer, worker, main, tests)
(Task 5-10)
Phase 3 (NAS cutover): _bg_render·_bg_create_slate를 Redis push로
+ card_renderer.py stub + Dockerfile 슬림화 (Task 11-13)
Phase 4 (nginx 3-layer 차단): /api/internal/* IP 화이트리스트 (Task 14)
Phase 5 (end-to-end 검증): 폴링 + PNG 생성 확인 (Task 15-16)
NAS Redis + WSL2 Docker + SMB mount (Plan-B-Base) prerequisite 완료.
다음 plan은 Plan-B-Music (Suno+MusicGen), Plan-B-Video (외부 API gateway).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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