CI showed GPU/window tests are ~70x slower when several share one
process (bundle/animation_sprite_spine.cpp: 373s vs 5s per-case under
Lavapipe), so the default make test/* now runs per-case (fast, process
isolated) and excludes bundle/* entries. Bundle runs remain available
via FILTER=bundle/<file>.cpp or ctest -L bundle for CPU-focused local
runs. ClassicScenes fast headless defaults (VIEW_SECONDS, PERF_FRAMES)
stay enabled.