sloproxy

feat(registry): add "max" level and remove deprecated Gemini models master

- Added a new "max" level to model `thinking.levels` for enhanced customization. - Removed deprecated Gemini 3 Pro (High/Low) models and associated fields from the registry. - Simplified `thinking` attribute structure for `grok-build-0.1` and `grok-composer-2.5-fast` models. Closes: #3901


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1 changed file