Wait for model container to be health in running models

[linmx0130]

During my work, I found that model launch can easily fail due to multiple reasons (not enough memory, vLLM not compatible with the model, etc.) but it is confusing since the Python CLI only prints out the model has started and asks users to wait for its ready.

This PR allows run model command to wait for the vLLM container to be ready based on the health check command.

Python CLI will show the command to check container logs if the model container fails:

$ liquidai model run-model-image --name lfm-7b-e --image "liquidai/lfm-7b-e:0.0.1"
Creating volume for model data: lfm-7b-e
Loading model data from image: liquidai/lfm-7b-e:0.0.1
Launching model container: lfm-7b-e
Model 'lfm-7b-e' started successfully
Waiting for model 'lfm-7b-e' to be healthy. This may take a 1-2 minutes...
Container lfm-7b-e is not healthy yet. Status: starting
Container lfm-7b-e is not healthy yet. Status: starting
Container lfm-7b-e is not healthy yet. Status: starting
Error: Model 'lfm-7b-e' failed to start serving requests
Use `docker logs 4d6a1c51978b` to obtain container loggings.

A successful launch looks like

$ liquidai model run-model-image --name "lfm-3b-e" --image "liquidai/lfm-3b-e:0.0.6"
Creating volume for model data: lfm-3b-e
Loading model data from image: liquidai/lfm-3b-e:0.0.6
Launching model container: lfm-3b-e
Model 'lfm-3b-e' started successfully
Waiting for model 'lfm-3b-e' to be healthy. This may take a 1-2 minutes...
Container lfm-3b-e is not healthy yet. Status: starting
Container lfm-3b-e is not healthy yet. Status: starting
Container lfm-3b-e is not healthy yet. Status: starting
Container lfm-3b-e is not healthy yet. Status: starting
Container lfm-3b-e is not healthy yet. Status: starting
Container lfm-3b-e is not healthy yet. Status: starting
Container lfm-3b-e is not healthy yet. Status: starting
Model 'lfm-3b-e' has started serving requests.

[tuliren]

Excellent!