Alpha: This API may change without notice; not recommended
for production use.

Returns a lean per-dataset projection — Dataset-GraphSummary — for
every dataset visible in the environment, plus the foreign-key and
transform-input edges between them. Sorted by id ascending.

Designed to feed the Explore Universe graph in a single call.
Intentionally unpaginated and intentionally unfiltered: this
endpoint applies a fixed default filter that excludes monitors
(isMonitor) and metric SMA datasets (isMetricSMA), and does
not accept a CEL filter or expand. Always returns 200 with
meta.totalCount equal to the number of returned datasets; the
-1 sentinel is not used here. Callers that need to defend
against very large environments should cap on the client side.

For arbitrary filtering or pagination, use GET /v1/datasets
instead. For the lineage neighborhood around a single dataset,
use GET /v1/datasets/{id}/graph.