ai: apply changes for #873 (1 review thread)

Addresses:
  - #3635998296 at src/databricks/sql/client.py:1782

Signed-off-by: peco-engineer-bot[bot] <peco-engineer-bot[bot]@users.noreply.github.com>

Author: peco-engineer-bot[bot]

src/databricks/sql/client.py

@@ -1780,7 +1780,16 @@ def close(self) -> None:
                 else:
                     logger.warning("close_command on cursor close failed: %s", e)
             except Exception as exc:
-                logger.warning("close_command on cursor close failed: %s", exc)
+                # Unlike the RequestError branch above (an expected, often
+                # transient network failure), reaching here means something we
+                # did not anticipate — surface the full traceback so it is
+                # diagnosable rather than indistinguishable from a benign
+                # network blip.
+                logger.warning(
+                    "close_command on cursor close failed unexpectedly: %s",
+                    exc,
+                    exc_info=True,
+                )
         self.active_command_id = None
 
     @property