dotenv .env file not loaded when component is deployed to a server

## Problem

`dotenv` successfully loads `.env` locally but does not load it when the component is deployed to a remote Harper server. Environment variables defined in `.env` are unavailable at runtime on the deployed instance.

The `loadEnv` built-in component (`hdb_env` system table) is the long-term solution (CORE-2695), but in the interim `dotenv` should behave consistently between local and deployed contexts.

🤖 Filed by Claude on behalf of Kris.