MAINT: adapt to new default keyword RECORD in FIND queries

Summary

#97 (closed)

Test Environment

unit und int tests

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• All automated tests pass
• Reference related issues
• Up-to-date CHANGELOG.md (or not necessary)
• Up-to-date JSON schema (or not necessary)
• Appropriate user and developer documentation (or not necessary)
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  • Problems with old code
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Check List for the Reviewer

• I understand the intent of this MR
• All automated tests pass
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• Appropriate user and developer documentation (or not necessary)
• The test environment setup works and the intended behavior is reproducible in the test environment
• In-code documentation and comments are up-to-date.
• Check: Are there specifications? Are they satisfied?

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