Adds an opt-in RedisIoAdapter (wired in main.ts when REDIS_URL is set) so
socket.io room emits fan out across instances via Redis pub/sub — a client on
replica B now receives messages emitted by replica A. Without REDIS_URL the
in-memory adapter is kept (single-instance dev unchanged). Adds redis to
docker-compose, REDIS_URL to the env contract, and smoke-realtime-cluster.mjs
which proves cross-instance delivery fails without Redis and passes with it.
Delivery is at-least-once at N>1; clients dedupe by message id (documented).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Adds a multi-stage Dockerfile for iios-service (build → pnpm deploy prune →
slim non-root runtime), a docker-entrypoint that runs `prisma migrate deploy`
then starts the server as PID 1, a .dockerignore, a fully-commented
.env.example config contract, and docs/DEPLOYMENT.md (topology, scaling,
release strategy, prod-readiness gaps). Moves prisma to dependencies so the
CLI ships in the prod bundle. Image builds, migrates, and serves /health 200.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
maaz519