### Description of the feature request: [Text Embedding offers elastic embedding sizes under 768](https://ai.google.dev/gemini-api/docs/models/gemini#text-embedding) The [python api](https://github.com/google-gemini/generative-ai-python) already [supports it](https://github.com/google-gemini/generative-ai-python/commit/b3a35c17893197af69d90f0f4b76afbfcf9df037) ### What problem are you trying to solve with this feature? _No response_ ### Any other information you'd like to share? _No response_