[Improve](streaming-job) support specifying offset for StreamingInsertJob create and alter#62490

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JNSimba wants to merge 7 commits intoapache:masterfrom

JNSimba:improve_special_offset

Commits on Apr 14, 2026

[Improve](streaming-job) support specifying offset for StreamingInsertJob create and alter

JNSimba
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claude
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[Improve](streaming-job) ALTER CDC offset only supports JSON, add TVF alter offset test

JNSimba
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claude
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[fix](streaming-job) fix checkstyle: line length and unused import

JNSimba
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claude
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