Repository navigation

2026.9.29.1: a workspace is one graph per configuration; the planning regression of 2026.9.28.3 fixed at its cause #702

Job	Run time
build 3 targets on linux	9m 42s
build 3 targets on macos	4m 57s
build 3 targets on windows	7m 37s
openkal e2e (the scripts, on a runner that has llvm)	12m 4s
run 3 builds on macos	20s
run 3 builds on linux	4s
run 3 builds on windows	7s
	34m 51s