fix: update tests to use non-EOL'd model

[zastrowm]

Description

Integ tests are failing because the model used is EOL; change to a non-EOL'd model

Type of Change

Bug fix

Testing

How have you tested the change? Verify that the changes do not break functionality or introduce warnings in consuming repositories: agents-docs, agents-tools, agents-cli

• I ran hatch run prepare

Checklist

• I have read the CONTRIBUTING document
• I have added any necessary tests that prove my fix is effective or my feature works
• I have updated the documentation accordingly
• I have added an appropriate example to the documentation to outline the feature, or no new docs are needed
• My changes generate no new warnings
• Any dependent changes have been merged and published

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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[github-actions]

Assessment: Approve

Clean, minimal change that correctly updates all integration test references from the EOL'd claude-3-7-sonnet-20250219 model to claude-sonnet-4-20250514. Verified no stale references remain in tests_integ/ and that the remaining claude-3-7-sonnet occurrences in the codebase (a docstring example and a unit test error-string assertion) are appropriate to keep as-is.

No issues found. LGTM! 👍