chore(deps): update dependency google-genai to v1

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
google-genai	>=0.2,<1 -> >=1,<2

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Release Notes

googleapis/python-genai (google-genai)

v1.0.0

Compare Source

⚠ BREAKING CHANGES

• Remove deprecated field: deprecated_response_payload

Features

• Add labels for GenerateContent requests (3e3b82d)
• Add Union support to response_schema (eedf4f1)
• Support automatic function calling in models.generate_content_stream and send_message_stream, sync and async mode (7c9f8b5)

Bug Fixes

• Avoid false test failure by skipping incompatible test case for python 3.13 (7f10e55)
• Default to list base models (instead of tuned models) (ef48f0d)
• Handle pydantic model type recognition gracefully for python 3.9 and 3.10 (4a38fdf)
• Raise error when Gemini API response_schema has 'default' or 'anyof' fields (c50bca0)
• Remove redundant contents in Automatic Function Calling history (5510595)
• Remove unsupported parameter from Gemini API (f8addb5)

Documentation

• Remove experimental classification from description. (b14ac57)
• Remove thoughts examples and update tests (af3b339)
• Update documentation on how to set api version using genai client (6fd4425)
• Update instruction on function calling experience in ANY mode. (451cf98)

Code Refactoring

• Remove deprecated field: deprecated_response_payload (197fa46)

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