`save_env_value()` captures the original .env file mode (e.g. 0640 for Docker
volume mounts) and restores it via `os.chmod` — but then unconditionally calls
`_secure_file(env_path)` on the next line, which re-tightens the mode to 0600
and defeats the entire preservation logic. The intent (preserve when
`original_mode` is captured, secure otherwise) was already in the code but
got short-circuited.
Move `_secure_file()` into the `else` branch so it only runs when no original
mode was captured — fresh `.env` files written for the first time still get
the 0600 hardening treatment, but operator-set modes survive subsequent writes.
Salvages #31518 by @blut-agent (config.py portion only). Their PR also bundled
unrelated lowercase-lookup changes in `hermes_cli/commands.py`; this salvage
takes only the focused config fix. The commands.py changes are reasonable on
their own merits but belong in a separate PR.
Co-authored-by: blut-agent <278569635+blut-agent@users.noreply.github.com>
Ben Barclay
e4a1b35a39