Fix retry_api_call to use getEffectiveLevel() instead of logger.level

logger.level returns 0 (NOTSET) when no level is explicitly set on the
logger, even when it inherits a level from a parent logger. This causes
after_log callbacks to not produce any visible output. Using
getEffectiveLevel() respects the logger hierarchy and returns the
correct inherited level.

Closes #649

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: laughingman7743

pyathena/util.py

@@ -190,7 +190,7 @@ def _is_retryable(ex: BaseException) -> bool:
             max=config.max_delay,
             exp_base=config.exponential_base,
         ),
-        after=after_log(logger, logger.level) if logger else None,  # type: ignore
+        after=after_log(logger, logger.getEffectiveLevel()) if logger else None,  # type: ignore
         reraise=True,
     )
     return retry(func, *args, **kwargs)