EdgeModel fails to import — `LadeSpecDecLLM` is undefined in cloud-edge-collaborative-inference-for-llm

[Priyanshu6968]

What happened:

The EdgeModel module in the cloud-edge-collaborative-inference-for-llm example fails to import. edge_model.py imports LadeSpecDecLLM from the models package at the top of the file:

# testalgorithms/query-routing/edge_model.py:21
from models import HuggingfaceLLM, APIBasedLLM, VllmLLM, EagleSpecDecModel, LadeSpecDecLLM
But LadeSpecDecLLM is not defined or exported anywhere in the repo.

What you expected to happen:

edge_model.py should import cleanly and EdgeModel should load for the supported backends. A missing/optional speculative-decoding backend should not break the whole example at import time.

How to reproduce it (as minimally and precisely as possible):

cd examples/cloud-edge-collaborative-inference-for-llm/testalgorithms/query-routing
python -c "import edge_model"

-> ImportError: cannot import name 'LadeSpecDecLLM' from 'models'

[Priyanshu6968]

/assign