The previous patch lower-cased `group` and `model` when building the
temporary `abilitySet` used to prevent duplicate inserts.
This merged models that differ only by letter case, e.g.
`GPT-3.5-turbo` vs `gpt-3.5-turbo`, causing them to disappear from the
user’s available-models list and pricing page.
Change:
• ability.go – removed all `strings.ToLower` calls when composing the
deduplication key (`group|model`), so duplicates are checked in a
case-sensitive manner while preserving the original data.
Result:
• `GPT-3.5-turbo` and `gpt-3.5-turbo` are now treated as distinct
models throughout the system.
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