What were the earliest non-signature-gated Taproot script-path spends just after activation (block 709635)

Shortly after Taproot activation (709632), script-path spends appear with trivial leaves such as bare OP_1. For example, transaction

• Questions: (1) What were the earliest such non-signature-gated spends, and (2) who deployed them (tests / experiments) and to what end?

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