AlloyDB AI adds pre-registered support for the following Gemini models in version

## Feature Feature AlloyDB AI adds pre-registered support for the following Gemini models in version 1.6.5 and later of the `google_ml_integration` extension: * `gemini-3.1-flash-lite` * `gemini-3.5-flash` * `gemini-3.5-flash-lite` * `gemini-3.6-flash` * `gemini-3.7-flash` * `gemini-3.8-flash` * `gemini-4-argon` Version 1.6.5 of the `google_ml_integration` extension sets `gemini-3.5-flash-lite` as the default Gemini model and removes the `gemini-2.0-flash`, `gemini-2.0-flash-lite`, `gemini-2.5-flash`, `gemini-2.5-flash-lite`, and `gemini-2.5-pro` models from the list of pre-registered models. Additionally, AlloyDB AI adds pre-registered support for the `semantic-ranker-512` reranking model. For more information, see[Pre-registered Agent Platform models](https://cloud.google.com/alloydb/docs/reference/supported-ai-models#pre-registered-models).