fix: Use max() instead of min() for request_max_duration statistic

The statistics tracking for maximum request duration was incorrectly
using min() instead of max(), causing the statistic to always show
the minimum duration instead of the maximum.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: vdusek

src/crawlee/statistics/_statistics.py

@@ -234,7 +234,7 @@ def record_request_processing_finish(self, request_id_or_key: str) -> None:
         state.request_min_duration = min(
             state.request_min_duration if state.request_min_duration is not None else timedelta.max, duration
         )
-        state.request_max_duration = min(
+        state.request_max_duration = max(
             state.request_max_duration if state.request_max_duration is not None else timedelta(), duration
         )