Get the workspace-wide asset <-> runnable graph

Macro-library → consumer edges (deploy-recorded call detection plus // use). Omitted when empty.

Ordering-only "must-run-after" edges — a // data_test relationships (or custom test reading a pipeline asset) requires the referenced asset's producer to run before the tested script. Not a data-consumption edge; fed into the cascade topo-sort so cold runs order correctly. Omitted when empty.