Unable to import opentelemetry packages with `mcr.microsoft.com/azure-functions/python:4-python3.13`

[ksstott]

I have a [basic reproduction](https://github.com/[ksstott/azure-functions-python-otel](https://github.com/ksstott/azure-functions-python-otel) of an issue I am having whereby I am unable to import from opentelemetry packages (e.g. from opentelemetry.exporter.otlp.proto.http.trace_exporter import OTLPSpanExporter) when using the mcr.microsoft.com/azure-functions/python:4-python3.13 image.

Running the docker image in the [basic reproduction](https://github.com/[ksstott/azure-functions-python-otel](https://github.com/ksstott/azure-functions-python-otel) will hang before finally starting but with 0 functions loaded however with no obvious error visible.
Removing the from opentelemetry.exporter.otlp.proto.http.trace_exporter import OTLPSpanExporter line allows the app to run successfully.
Alternatively switching to the mcr.microsoft.com/azure-functions/python:4-python3.12 image (but keeping the import statement) also allows the app to run successfully.

I've deployed this app to a regular flex-consumption app in Azure using func azure functionapp publish and this works successfully which leads me to believe that this is something specific to docker