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When an accelerator ReadRows stream yields a malformed chunk (such as an empty row key), merge_rows raises InvalidChunk. Catch InvalidChunk in handle_accelerator_error to trip the breaker and fall back to the native GAPIC client.
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This pull request adds handling for InvalidChunk exceptions in the Bigtable accelerator fallback mechanism. When an InvalidChunk is encountered, the breaker is tripped, a warning is logged, and the client falls back to the native Bigtable client. Unit tests have been added to verify this behavior. I have no feedback to provide as the implementation is clean and well-tested.
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Fixes #<issue_number_goes_here> 🦕