`flake8-boolean-trap.extend-allowed-calls` don't resolve class types

I am actually working on fixing the rule **boolean-positional-value-in-call (FBT003)** on a code repository.

I need to allow this rule for some functions. For that, at the end of my config file "pyproject.toml", I have added:

```
[lint.flake8-boolean-trap]
extend-allowed-calls = ["LibName.className.functionName"]
```

My issue here is that in my code repository, we call the function "LibName.className.functionName" through a variable, as following:

```
from LibName import ClassName

with ClassName("[Description]") as variable:
variable.functionName(...)
```

On such code, the rule FBT003 is **still applied** in spite of the "extend-allowed-calls" option.

Is the "extend-allowed-calls" option only works for direct function calls?

Start by reproducing the FBT003 example with the shown pyproject.toml configuration and the ClassName context manager pattern. Trace how extend-allowed-calls handles direct calls versus variable.functionName calls; done means the behavior is either correctly supported for the reported pattern or clearly documented if only direct calls are intended.

Written by the indexing model from the issue text.