test: Fix flaky test_timeout_in_handler

[vdusek]

Summary

• Increased non_realtime_system_coefficient from 2 to 10 in test_timeout_in_handler to fix CI flakiness
• The outer asyncio.timeout(12s) was too tight for slow CI machines (macOS/Windows), causing the crawler run to be cancelled before all 3 retry attempts could complete
• New timeout of 60s provides sufficient headroom while the test still completes in ~2s locally

Test plan

• Verified test passes consistently locally (5/5 runs in ~2.1s each)
• CI passes on macOS/Windows runners

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.31%. Comparing base (142e4ef) to head (a04c48f).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1764      +/-   ##
==========================================
+ Coverage   92.23%   92.31%   +0.08%     
==========================================
  Files         156      156              
  Lines       10645    10645              
==========================================
+ Hits         9818     9827       +9     
+ Misses        827      818       -9     

Flag	Coverage Δ
unit	92.31% <ø> (+0.08%)	⬆️

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