Scaffold dd0c/portal: AWS+GitHub discovery, catalog service, ownership resolution

- AWS scanner: ECS/Lambda/RDS discovery with partial failure handling
- GitHub scanner: CODEOWNERS parsing, commit-based heuristic ownership, rate limit resilience
- Catalog service: ownership resolution (config > codeowners > aws-tag > heuristic), staged updates for partial scans
- Ownership tests: 6 cases covering full priority chain
- PostgreSQL schema with RLS: services, staged_updates, scan_history, free tier (50 services)
- Fly.io config, Dockerfile

products/04-lightweight-idp/Dockerfile

@@ -0,0 +1,14 @@
+FROM node:22-slim AS builder
+WORKDIR /app
+COPY package.json package-lock.json* ./
+RUN npm ci
+COPY . .
+RUN npm run build
+
+FROM node:22-slim
+WORKDIR /app
+COPY --from=builder /app/dist ./dist
+COPY --from=builder /app/node_modules ./node_modules
+COPY --from=builder /app/package.json ./
+EXPOSE 3000
+CMD ["node", "dist/index.js"]