Fixed #398 FastAPI integration fails if docs are disabled.

[danielmorell]

Description of the change

This resolves the issue #398 preventing users from disabling docs. Instead of assuming that a router should always have four routes we check if any of the routs are not the standard FastAPI routes.

Type of change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Maintenance
• New release

Related issues

• Fix FastAPI integration fails if docs are disabled #398

Checklists

Development

• Lint rules pass locally
• The code changed/added as part of this pull request has been covered with tests
• All tests related to the changed code pass in development

Code review

• This pull request has a descriptive title and information useful to a reviewer. There may be a screenshot or screencast attached
• "Ready for review" label attached to the PR and reviewers assigned
• Issue from task tracker has a link to this pull request
• Changes have been reviewed by at least one other engineer