test: Fix flaky tests in adaptive crawler and sitemap loader

Add @pytest.mark.flaky(rerun=3) to test_adaptive_context_query_selector_beautiful_soup
matching the parsel variant. Increase timeout in test_data_persistence_for_sitemap_loading
from 2s to 10s to avoid TimeoutError on Windows CI with httpx.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: vdusek

tests/unit/crawlers/_adaptive_playwright/test_adaptive_playwright_crawler.py

@@ -631,6 +631,10 @@ async def request_handler(context: AdaptivePlaywrightCrawlingContext) -> None:
     mocked_browser_handler.assert_called_once_with()
 
 
+@pytest.mark.flaky(
+    rerun=3,
+    reason='Test is flaky on Windows and MacOS, see https://github.com/apify/crawlee-python/issues/1650.',
+)
 async def test_adaptive_context_query_selector_beautiful_soup(test_urls: list[str]) -> None:
     """Test that `context.query_selector_one` works regardless of the crawl type for BeautifulSoup variant.
 

tests/unit/request_loaders/test_sitemap_request_loader.py

@@ -144,7 +144,7 @@ async def wait_for_sitemap_loader_not_empty(sitemap_loader: SitemapRequestLoader
     sitemap_loader = SitemapRequestLoader([str(sitemap_url)], http_client=http_client, persist_state_key=persist_key)
 
     # Give time to load
-    await asyncio.wait_for(wait_for_sitemap_loader_not_empty(sitemap_loader), timeout=2)
+    await asyncio.wait_for(wait_for_sitemap_loader_not_empty(sitemap_loader), timeout=10)
 
     await sitemap_loader.close()