Feature request: configurable AuthenticationSecretFile in addition to existing AuthenticationSecret

[jfly]

Description

Today, I can configure ImmichFrame with an AuthenticationSecret. I'd like to be able to configure ImmichFrame with a path to file containing the api key, in other words, a new AuthenticationSecretFile config.

Use Case

Just like #510: The existing AuthenticationSecret totally works, but requires embedding secrets in my config file. I prefer to manage my secrets separately, so this would be quite useful.

Details

No response

Pre-Submission Checklist

• This is a feature request and not a bug report

• I have checked for related issues and checked the documentation