Env variables not preserved after hotpatching

**Problem**

Environment variables are not preserved after hotpatching when running `dx serve --hotpatch`.

**Steps To Reproduce**

Steps to reproduce the behavior:

- Run `dx serve --hotpatch` (e.g., `dx serve --hotpatch --web --port 1202`), with env variables configured via `.env` file or injected via CLI (e.g., `export DATABASE_URL=postgresql://user:pass@ip:port/db_name && dx serve --hotpatch --web --port 1202`).
- On initial startup, everything loads correctly and Dioxus application behaves as expected.
- Make changes to Rust library/binary code used in Dioxus application.
- Hotpatch succeeds, but fails to reload env variables. Will see logs corresponding to failure to load env variables as needed by application, e.g., `[server] DATABASE_URL must be set via .env file or environment variable`.

**Expected behavior**

Environment variables should be reloaded correctly when hotpatching, without needing to fully rebuild the application.

Note that this is not a problem if we run **without** hotpatching flag, i.e., if we fully rebuild each time we make non-reloadable changes.

**Environment:**

- Dioxus version: v0.7.3
- Rust version: v1.93.1
- OS info: macOS 26.2
- App platform: web, desktop (may happen with other platforms too, but only tested these)