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Yuneng Jiang
aa2ef41200
Greptile review on #26756 (P2): if `attempt_db_reconnect` itself raises (e.g. lock cancellation, timer error, unexpected internal failure), the original `httpx.ReadError` / transport error was lost — `failure_handler` and `db_exceptions` alerts then logged the reconnect exception instead of the actual DB transport problem, masking the root cause. Wrap the reconnect call in a try/except. On reconnect failure, re-raise the *original* `first_exc` and chain the reconnect error as `__cause__` so it remains visible for debuggability without becoming the primary exception observers see. Adds `test_call_with_db_reconnect_retry_preserves_original_error_when_reconnect_raises` asserting (a) the propagated exception is the original transport error and (b) the reconnect exception is attached as `__cause__`.