Change default use_hybrid_disposition to False

[samikshya-db]

Summary

• Changed the default value of use_hybrid_disposition from True to False in the SEA backend
• Currently, backend is not ready for turning on this feature by default in this driver, we will skip it's usage till then

Changes

• This disables hybrid disposition by default for SEA backend connections

Test plan

• Verify existing tests pass
• Confirm that users can still explicitly enable hybrid disposition by passing use_hybrid_disposition=True

[github-actions]

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