The richer static-catalog builder's group-building loop used a strict item["id"]
extraction that would KeyError (caught → degrade to the minimal one-model catalog)
for legal config shapes where providers.<id>.models is a list of dicts keyed by
"model"/"name" rather than "id". Mirror the tolerant id-or-model-or-name resolution
the detection loop already uses, skip entries with nothing usable, and add a
regression test. No behavior change for the common list-of-strings / list-of-id-dicts
shapes.
docs(changelog): stamp #4052 model-picker budget fallback as v0.51.370 (Release MI)