get_model answers the capabilities list only — no phase or steps for a loading model

[teemow]

Problem

While a model loads, get_model (called through the muster CLI as the person) returns the model's capabilities list and nothing about its state: no phase, no steps, no condition. A caller polling for readiness gets no signal and has to read the LLMInferenceService condition directly. load_model and the inventory carry the phase; get_model should too.

Proposed solution

get_model returns the same phase and step list the load path publishes (Pending, weights, engine start, Ready, or the failure reason), alongside the capabilities.

Acceptance criteria

• get_model for a loading model shows its phase and current step; for a failed one, the reason.

[teemow]

Also seen on a crash-looping predictor (gemma-4-31b, 3 restarts in 20 min): get_model showed no phase, no restart count and no last error; the crash was visible only through kubectl logs --previous. The phase should carry the container's last termination message.