Add singleton helper function for lazy initialization of instances#34

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ogroppo wants to merge 3 commits intomainfrom

Commits on Feb 13, 2026

Add singleton helper function for lazy initialization of instances
ogroppo
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Update version to 4.9.0 and document addition of singleton helper function in CHANGELOG.md
ogroppo
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Refactor singleton helper function to improve instance management by using a boolean flag for instance existence, enhancing error handling for promise rejections.
ogroppo
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