- Disable Windows Defender real-time/script/archive scanning (and exclude
the workspace, cargo, rustup and vcpkg trees) at the start of the
Windows job: the ephemeral runner spends a large share of a cold build
having every object file scanned.
- Raise the openKylin container /dev/shm from 2 GiB to 8 GiB: the suite's
parallel worker pools plus the 512 MiB shared-memory spike used to run
dry, surfacing as an intermittent SIGSEGV in the oak-render tests.
- Add a gdb backtrace step on failure for the big suites (the openKylin
image installs gdb) so a native crash lands in the log next time.