feat: initialize ingest-api with Koa and telemetry handling

- Create ingest-api with Koa framework for handling device telemetry.
- Implement telemetry ingestion with MongoDB, Redis, and PostgreSQL.
- Add API endpoints for telemetry and health checks.
- Set up testing with Vitest for unit and end-to-end tests.
- Configure Prettier and ESLint for code formatting and linting.
- Create Docker Compose setup for PostgreSQL, MongoDB, and Redis services.
- Establish contracts package for shared Zod schemas and TypeScript types.
- Implement React frontend with device status and greeting functionalities.
- Add VS Code setup documentation for onboarding developers.

README.md

@@ -1,20 +1,35 @@
 # marco-trest-test
 
-Internal onboarding workspace for learning and testing the private `trest` package.
+Onboarding template: device ingest (Koa) vs user CRUD (Express), shared Zod contracts, Compose for Postgres / Mongo / Redis.
 
-## Start Here
+## Layout
 
-1. Read [docs/trest-onboarding.md](docs/trest-onboarding.md) for full setup instructions.
-2. Follow [docs/trest-test-plan.md](docs/trest-test-plan.md) to validate installation and basic usage.
-3. If you are new to Yarn, read [docs/yarn-basics-cheatsheet.md](docs/yarn-basics-cheatsheet.md).
-4. If you come from Express + SQL background, read [docs/express-sql-to-monorepo-guide.md](docs/express-sql-to-monorepo-guide.md).
+```text
+packages/contracts    Zod only
+apps/ingest-api       Koa  POST /telemetry
+apps/crud-api         Express  GET /greeting  GET /devices/:id/status
+apps/web              React + Redux + axios + Tailwind
+```
 
-## Goal
+Read [docs/architecture.md](docs/architecture.md) for the mermaid diagrams and the dual-write warning.
 
-By the end of this onboarding, you should be able to:
+## Start
 
-- Access the private repository in Gitea.
-- Install `trest` in a local sandbox project.
-- Run a small smoke test and a few behavior checks.
-- Document what worked, what failed, and open questions for the team.
+```bash
+docker compose up -d
+yarn install
+yarn dev:crud
+yarn dev:ingest
+yarn dev:web
+```
 
+- UI: http://127.0.0.1:5173/devices
+- Greeting: http://127.0.0.1:5173/greeting
+- Express: http://127.0.0.1:3000/greeting?name=Marco
+- Ingest: `POST http://127.0.0.1:3001/telemetry`
+
+Frontend-only install (no Mongo/Koa):
+
+```bash
+yarn workspaces focus web
+```