fix(tests): update retired claude-3-haiku model in integration tests

[afarntrog]

Description

Replace claude-3-haiku-20240307 with claude-haiku-4-5-20251001 in summarizing conversation manager integration test fixtures. The old model was retired by Anthropic on April 20, 2026, causing 404 errors.

https://platform.claude.com/docs/en/about-claude/model-deprecations#model-status

Related Issues

Documentation PR

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.

📢 Thoughts on this report? Let us know!

[github-actions]

Assessment: Approve

Straightforward and correct fix — replaces the retired claude-3-haiku-20240307 model ID with claude-haiku-4-5-20251001 in the two Anthropic direct API fixtures. All Anthropic-direct references are covered.

Review Details

• Completeness: The Bedrock-format references to anthropic.claude-3-haiku-20240307-v1:0 in tests_integ/test_cancellation.py (4 occurrences) may also be affected by the same model retirement and could be worth updating in this PR or a follow-up.
• Checklist: The hatch run prepare checkbox is unchecked — please confirm the test suite passes before merge.

Clean, minimal fix. 👍