fix(error): map error codes to portable std conditions via default_er…

[mvandeberg]

…ror_condition

Override default_error_condition in error_cat so each
capy error maps to its canonical portable condition: canceled ->
std::errc::operation_canceled, timeout -> std::errc::timed_out, and eof/stream_truncated/not_found to their cond::* equivalents.

Resolves #267

[cppalliance-bot]

An automated preview of the documentation is available at https://324.capy.prtest3.cppalliance.org/index.html

If more commits are pushed to the pull request, the docs will rebuild at the same URL.

2026-06-19 16:03:03 UTC

[cppalliance-bot]

GCOVR code coverage report https://324.capy.prtest3.cppalliance.org/gcovr/index.html
LCOV code coverage report https://324.capy.prtest3.cppalliance.org/genhtml/index.html
Coverage Diff Report https://324.capy.prtest3.cppalliance.org/diff-report/index.html

Build time: 2026-06-19 16:17:34 UTC

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.07%. Comparing base (d21ae5d) to head (62d3190).
⚠️ Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #324   +/-   ##
========================================
  Coverage    98.07%   98.07%           
========================================
  Files          164      164           
  Lines         8758     8774   +16     
========================================
+ Hits          8589     8605   +16     
  Misses         169      169           

Flag	Coverage Δ
linux	98.17% <ø> (+<0.01%)	⬆️

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Files with missing lines	Coverage Δ
include/boost/capy/error.hpp	100.00% <ø> (ø)
src/error.cpp	100.00% <100.00%> (ø)

... and 6 files with indirect coverage changes

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