SSH Commit Signing

I've stated signing my git commits using SSH.

However this only seems to work with setting the SSH_AUTH_SOCK env variable. For some reasons I cannot set that variable everywhere and have to rely on host specific IdentityAgent configuration.

This is the error
```
git commit -m"test"
error: Load key "/var/folders/z//T//.git_signing_key": invalid format?

fatal: failed to write commit object
```

Prepending the command with SSH_AUTH_SOCK=~/.1password/agent.sock git commit -m"test" works.

This issue also applies to VSCode.

As per the https://git-scm.com/docs/git-config#Documentation/git-config.txt-gpgltformatgtprogram, to used program is ssh-keygen. I guess it doesn't read ssh config files or at least wouldn't be aware of a host to use.

Question: Does 1Password provide a binary compatible to ssh-keygen that I could set as gpg.ssh.program in my gitconfig?

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1Password Version: 8.7.3
Extension Version: Not Provided
OS Version: macOS
Browser:_ Not Provided