Fix async cancellation failing to send TDS attention signal#4435

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cheenamalhotra wants to merge 10 commits into

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dev/cheena/fix-async-cancel-attention

Commits on Jul 9, 2026

Fix async cancellation failing to send TDS attention signal

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Add manual test for async cancellation with partial results

cheenamalhotra
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Address review: fix test to cancel before ExecuteReaderAsync and accept SqlException

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Add AE test for async cancellation via CreateLocalCompletionTask path

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Address review feedback: fix test accuracy

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Potential fix for pull request finding

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Address review: add CTS assertions, fix AE test query order

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Revert CreateLocalCompletionTask lock removal to fix AE test

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Address review: add infinite WHILE loop test, fix CTS timing, clarify comment

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Address review: clarify lock comment, add watchdog to while-loop test

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