Reject invalid Intrade classic expiry conversions

[LimiNode]

Summary

• reject invalid Intrade CLASSIC expiry conversions before queue admission
• keep platform-specific five-minute expiry grid checks in the Intrade preprocessor
• add negative coverage for too-short duration, off-grid duration, misaligned absolute expiry, and too-close absolute expiry

Validation

• cmake --build build-codex-pr111-mingw --target intrade_bar_api_response_test --parallel 1
• .\build-codex-pr111-mingw\intrade_bar_api_response_test.exe --gtest_brief=1
• cmake --build build-codex-pr111-mingw --target bridge_umbrella_include_test --parallel 1
• .\build-codex-pr111-mingw\bridge_umbrella_include_test.exe --gtest_brief=1
• git diff --check