chore: revert TxFactory changes

[robert-zaremba]

Description

Since don't remove all legacy REST endpoints we don't need the 0155244 commit which breaks the API. Let's keep the v0.44 changes to the absolute minimum.

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Author Checklist

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• added a changelog entry to CHANGELOG.md
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• confirmed the correct type prefix in the PR title
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• reviewed state machine logic
• reviewed API design and naming
• reviewed documentation is accurate
• reviewed tests and test coverage
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