[Bug] Spurious error message displayed when running `--help`

[kei-g]

Git commit

$ git rev-parse HEAD
1f9ee88

Operating System & Version

Ubuntu 24.04

GGML backends

CUDA

Command-line arguments used

sd-cli --help

Steps to reproduce

$ sd-cli --help

and also,

$ sd-server --help

What you expected to happen

Running --help should display the help text and exit cleanly without printing any error messages.

What actually happened

Both sd-cli and sd-server always print an error message.

Logs / error messages / stack trace

[ERROR] common.cpp:302  - error: invalid parameter for argument: --help

Additional context / environment details

No response