Fix google call params error 936

[ionflow]

Closes: #936

Fix: Improve handling of configuration parameters in Google API calls

Issue: Error when calling google with call_params #936

Description

This PR fixes an issue where the Google API would fail with an AsyncModels.generate_content() got an unexpected keyword argument 'generation_config' error when using call_params.

The root problem was in how common parameters were being transferred from the conversion function to the actual API call configuration. By addressing this at the source, we've created a more robust solution that follows the codebase's established patterns.

Changes

• Implemented a cleaner approach to handling parameters in _setup_call.py by properly transferring generation_config parameters to the API's required config object
• Ensured stop sequences are always correctly formatted as arrays in _convert_common_call_params.py to match Google API requirements

Tests

• Fixed the existing test file tests/core/google/test_call_params.py to properly type-cast parameters
• Verified API compatibility with careful parameter handling

This code now doesn't fail:

from mirascope import llm
from mirascope.core import google
from pydantic import BaseModel
from dotenv import load_dotenv
import os
import asyncio

load_dotenv()

class Book(BaseModel):
    title: str
    author: str

os.environ["GOOGLE_API_KEY"] = os.getenv("GOOGLE_API_KEY")

@llm.call(
    provider="google",
    model="gemini-2.0-flash",
    json_mode=True,
    response_model=Book,
)
async def recommend_book(genre: str) -> str:
    return f"Recommend a {genre} book"

async def main():
    override_response = await llm.override(
        recommend_book,
        provider="google",
        model="gemini-2.0-flash",
        call_params={"max_tokens": 100, "temperature": 0.7},
    )("fantasy")
    
    print(override_response)

if __name__ == "__main__":
    asyncio.run(main())

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (093ebb5) to head (f1fde32).
Report is 9 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #937   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files          515       515           
  Lines        21070     21109   +39     
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+ Hits         21070     21109   +39     

Flag	Coverage Δ
tests	100.00% <100.00%> (ø)

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