test: Increase timeout coefficient in flaky test_timeout_in_handler

The outer asyncio.timeout(12s) was too tight for slow CI machines
(macOS/Windows), causing the test to be cancelled before all retries
could complete. Increased non_realtime_system_coefficient from 2 to 10
(60s timeout) to provide sufficient headroom.

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

Author: vdusek

tests/unit/crawlers/_basic/test_basic_crawler.py

@@ -1375,7 +1375,7 @@ async def test_timeout_in_handler(sleep_type: str) -> None:
     # Test is skipped in older Python versions.
     from asyncio import timeout  # type:ignore[attr-defined] # noqa: PLC0415
 
-    non_realtime_system_coefficient = 2
+    non_realtime_system_coefficient = 10
     handler_timeout = timedelta(seconds=1)
     max_request_retries = 3
     double_handler_timeout_s = handler_timeout.total_seconds() * 2