feat(wave5): CI/CD pipeline + Vault KMS + OKR deploy to port 80/3001

Infrastructure (H3 CI gate, H5 KMS):
- Gitea Actions enabled (GITEA__actions__ENABLED=true)
- act_runner: Docker-outside-of-Docker for deploy job
- Vault Transit RSA-2048 signing keys (casan-audit-key, casan-policy-key)

Vault KMS scripts (H5 governance):
- .specify/scripts/bash/vault-kms.sh — sign/verify/pubkey/ensure-key
- .specify/scripts/bash/sign-audit-head.sh — sign audit chain via Vault
- Updated sign-policy-bundle.sh — Vault path + local fallback
- Updated security-gate.sh — KMS gate added (PASS=11 FAIL=0)

OKR app deployment (port 80/3001):
- Dockerfile.backend — node:22-slim (node:sqlite requires Node 22)
- Dockerfile.frontend — node:20-alpine build + nginx:alpine runtime
- nginx/nginx.conf — React SPA + /api/v1/* proxy to okr-backend:3001
- backend/entrypoint.sh — auto init DB on first run + seed
- .dockerignore

CI pipeline (.gitea/workflows/ci.yml):
- Job 1: Vitest frontend tests (H3)
- Job 2: CASAN security gate + Vault KMS signing (H4/H5)
- Job 3: Deploy OKR → port 80 (runs on push to main after tests pass)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

AINative_OKR_CASAN5/Dockerfile.backend

@@ -0,0 +1,55 @@
+# ─── Stage 1: Build ──────────────────────────────────────────────────────────
+FROM node:22-slim AS builder
+
+WORKDIR /app
+
+RUN apt-get update -qq && apt-get install -y -qq openssl python3 && rm -rf /var/lib/apt/lists/*
+
+COPY package.json package-lock.json ./
+COPY backend/package.json ./backend/
+COPY frontend/package.json ./frontend/
+COPY backend/prisma ./backend/prisma
+
+RUN npm ci
+
+COPY backend/src ./backend/src
+COPY backend/tsconfig*.json ./backend/
+
+# Generate Prisma client + compile TypeScript
+RUN cd backend && npx prisma generate && npx tsc -p tsconfig.build.json
+
+# ─── Stage 2: Runtime ────────────────────────────────────────────────────────
+FROM node:22-slim AS runtime
+
+# node:sqlite (setup-sqlite.mjs) requires Node 22 — this image satisfies that.
+
+WORKDIR /app
+
+RUN apt-get update -qq && apt-get install -y -qq openssl && rm -rf /var/lib/apt/lists/*
+
+COPY package.json package-lock.json ./
+COPY backend/package.json ./backend/
+COPY frontend/package.json ./frontend/
+COPY backend/prisma ./backend/prisma
+
+# All deps (including devDeps) so that tsx (seed) and prisma CLI are available.
+RUN npm ci --ignore-scripts
+
+# Generate Prisma client in runtime image (CWD resolves schema at backend/prisma/schema.prisma)
+RUN cd backend && npx prisma generate
+
+COPY --from=builder /app/backend/dist ./backend/dist
+COPY backend/scripts ./backend/scripts
+COPY backend/entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+
+WORKDIR /app/backend
+
+VOLUME ["/data"]
+EXPOSE 3001
+
+ENV PORT=3001
+ENV DATABASE_URL=file:/data/okr.db
+ENV NODE_ENV=production
+
+ENTRYPOINT ["/entrypoint.sh"]