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

Returns the BFS-nearest lineage neighborhood around the focal
dataset id, walking transform data-input edges (InputRole=Data)
in both directions over the default-filtered dataset set
(excludes monitors and metric SMA datasets). The response uses
the same Dataset-GraphResponse shape as GET /v1/datasets/graph.

Lineage view semantics: foreign-key edges are not traversed by
this endpoint — they are surfaced by the full-graph endpoint for
the Link/Explore-Universe views. Reference-role transform inputs
are also excluded.

Ordering within the response is BFS order: focal dataset first,
then by BFS depth, ties broken by id ascending. If the walk
exceeds limit, the response is truncated to the nearest limit
nodes and meta.totalCount is set to -1. CEL filter and
expand are not supported.