fix: tolerate non-UTF-8 bodies in ApifyRequestList remote sources

[vdusek]

Summary

• ApifyRequestList._process_remote_url decoded remote requestsFromUrl response bodies with response_body.decode('utf-8') in strict mode. Any source returning non-UTF-8 bytes (latin-1, Windows-1252, binary, etc.) raised UnicodeDecodeError, and because _fetch_requests_from_url uses asyncio.gather without return_exceptions=True, the error propagated out of ApifyRequestList.open and crashed Actor startup — taking well-formed sibling sources down with it.
• Switch the decode to errors='replace'. URL_NO_COMMAS_REGEX only matches ASCII, so replacing invalid bytes with U+FFFD doesn't change which URLs are extracted; it just avoids the crash.
• Added a regression test that serves a latin-1 body containing 0xE9 and asserts the embedded URL is still extracted.

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.67%. Comparing base (16bf07d) to head (711e529).
⚠️ Report is 8 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #871      +/-   ##
==========================================
+ Coverage   86.64%   86.67%   +0.03%     
==========================================
  Files          48       48              
  Lines        2920     2920              
==========================================
+ Hits         2530     2531       +1     
+ Misses        390      389       -1     

Flag	Coverage Δ
e2e	37.87% <0.00%> (ø)
integration	59.31% <0.00%> (+0.03%)	⬆️
unit	74.69% <100.00%> (ø)

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