fix: tracing fastapi app

[minatooni]

close #804

Here, FastAPI accepts Sequence and the current implementation of InstanaASGIMiddleware insert does not cover tuple
https://github.com/fastapi/fastapi/blob/450a334253b1426aab08b4dea17b16ba8b4c098c/fastapi/applications.py#L472

Are there any document that describes how to run tests? This is super small change tho

[minatooni]

Got following error on CI test but it looks like not caused by my pr

python 3.12 kafka

• FAILED tests/clients/kafka/test_kafka_python.py::TestKafkaPython::test_trace_kafka_python_consume - AssertionError: assert 1 == 3

python 3.13 test

• FAILED tests/frameworks/test_grpcio.py::TestGRPCIO::test_no_root_exit_span - AssertionError: assert 1 == 0
• FAILED tests/frameworks/test_tornado_server.py::TestTornadoServer::test_get - AssertionError: assert 2 == 3

[minatooni]

@pvital Added else statement. Could you please take a look for this pr again?

[pvital]

It looks good to me.