fix: HF env variables not being set when offline mode is False

[Neonkraft]

Summary

_apply_hf_env_from_file was only called inside the if config.offline: block in scripts/submit.py, so HF cache env vars (HF_HOME, HF_HUB_CACHE, etc.) from container.env_file were never applied on the login node when offline=False. This moves the call above the offline check so the env vars are always applied whenever a container env_file is configured, regardless of offline mode.

Type of change

• Bug fix
• New feature
• Refactor
• Performance
• Documentation
• Maintenance

[Copilot]

Pull request overview

This PR fixes Hugging Face cache environment variables not being applied on the login node when offline=False, by ensuring the container env_file is parsed and HF cache vars are exported into the submit process environment regardless of offline mode.

Changes:

• Move _apply_hf_env_from_file(config.container.env_file) to run before the config.offline check.
• Ensure HF cache env vars (e.g., HF_HOME, HF_HUB_CACHE) are consistently applied whenever container.env_file is configured.

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