[feat] Lineage explorer and audit views

[St4NNi]

Depends on: arunaengine/aruna#364

Goal

Everything traceable from the UI: a data-centric lineage explorer (object/dataset → producing and consuming runs, staging sources, syncs, exports) plus a view over the audit trail.

Workplan

1. Lineage graph view on dataset/object detail pages
2. Run detail linking inputs/outputs back into the graph
3. Audit trail view with filtering, gated by permissions

Definition of Done

• The lineage of a dataset spanning staging, compute, sync, and export is navigable in the portal

Test Concept

E2e against a seeded lineage graph.