Add warning about enabling logs in production to logging documentation

[Siddhant-K-code]

Description

This PR updates the logging documentation to include an important warning about enabling logs in production environments. Disabling logging by setting --log-level to none can mask important operations and hinder the ability to detect and diagnose issues, including potential security incidents.

References

Related openfga/openfga#1703

Review Checklist

• I have clicked on "allow edits by maintainers".
• I have added documentation for new/changed functionality in this PR or in a PR to openfga.dev [Provide a link to any relevant PRs in the references section above]
• The correct base branch is being used, if not main
• I have added tests to validate that the change in functionality is working as expected

[Siddhant-K-code]

🫠

[rhamzeh]

Thanks @Siddhant-K-code !

(Don't worry about the failing PR - PR Previews only work for branches in the repo)

Once another maintainer approves, we can merge

[Siddhant-K-code]

How does this PR got closed 🤔