Adds a 5th tab to the admin pipeline page showing the full 3-layer
SQLMesh data lineage: 28 models, 35 edges across staging / foundation /
serving swim lanes.
- _DAG: canonical model dependency dict in pipeline_routes.py;
update when models are added/removed
- _classify_layer(): derives layer from name prefix (stg_/dim_fct_/rest)
- _render_lineage_svg(): pure Python SVG generator — 3-column swim lane
layout, bezier edges, color-coded per layer (green/blue/amber),
no external dependencies
- /lineage route: HTMX tab handler
- pipeline_lineage.html: partial with SVG embed + vanilla JS hover
effects (highlight connected edges, dim unrelated)
- pipeline.html: 5th "Lineage" tab button
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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