[migration-0102] Change logic migration data of postgresql

[nhuantho]

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• Close Migration 0102 downgrade holds exclusive lock on task_instance for extended period during TEXT→VARCHAR(250) rewrite #63545

Testing

• Verify logic of query of task_instance

• Before

• Run query

• After

• Verify logic of query of task_instance_history

Was generative AI tooling used to co-author this PR?

• Yes (please specify the tool below)

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