#728 Tiltfile + docker-compose for local dev with hot reload

## Task Create Tiltfile and docker-compose.dev.yml for local development with hot reload. ## Requirements 1. Hot reload for: - API (Python/FastAPI) - use volume mounts + watchfiles - Dashboard (React/Vite) - use Vite HMR - Workers (Python) - volume mounts + auto-restart 2. Services in docker-compose.dev.yml: - postgres (local dev instance, NOT pg.rodmena.app) - api (port 7822) - dashboard (port 3000) - worker (1 replica) - activity-worker (1 replica) - internal-worker (1 replica) - vault (dev mode, optional) 3. Tiltfile features: - Watch engine/ directory -> sync to containers - Watch ../highway-dashbaord/src -> sync to dashboard - Live reload without full rebuild - Tilt UI accessible at tilt.highway.rodmena.app 4. Resource limits (dev is lightweight): - Workers: 256Mi memory each - API: 512Mi memory - Dashboard: 256Mi memory ## Files to create - docker-compose.dev.yml - Tiltfile - docker/dev.env (environment overrides) ## Parent: #726