- EVENGINE_ENABLE_STRICT_WARNINGS option: MSVC /W4 /WX, GCC/Clang
-Wall -Wextra -Werror, with documented noise suppressions and
-isystem/-external:I for third-party headers; enabled on the
Windows/Linux debug CI jobs.
- Fix warnings across engine, modules and tests exposed by the gate,
including real bugs (incomplete-type deletes, Timespan microsecond
overflow, overload hiding, enum switch gaps, dead code).
- Add Linux ASan+UBSan job, example smoke step, python-tools test
job, ruff config (scripts+tools), weekly Linux coverage job and a
CodeQL workflow.