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The ERD reference pages embedded the schema as an SVG image, so table and column names weren't indexed by search engines or full-text search. The generate_erd Sphinx extension already regenerates the diagram from the live SQLAlchemy models on every doc build, so switching its output format doesn't introduce any new staleness risk. eralchemy (already a doc-build dependency) can emit Mermaid ER-diagram markup directly, removing the need for the graphviz system package during doc generation.