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.

apps/crud-api/README.md

@@ -0,0 +1,3 @@
+# crud-api
+
+Express + Drizzle. User-facing HTTP. Reads `device_current_state` from Postgres and optional Redis presence. Does not accept device telemetry.