GH-4414 Fixed the issue in `OllamaApiHelper` where `thinking` and `toolName` were missing when merging messages#4419

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sunyuhan1998 wants to merge 2 commits intospring-projects:mainfrom

sunyuhan1998:fix-issue-4414

Commits on Sep 19, 2025

fix: GH-4414 fixed the issue in `OllamaApiHelper` where `thinking` and `toolName` were omitted when merging messages; added unit tests for `OllamaApiHelper`
sunyuhan1998
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fix: fix code format
sunyuhan1998
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