The migration in add-reviewer.sql is now applied after schema.sql.
Update erd.html to show the resulting database, preserving the existing design.
Keep all table and column names. Check whether the assignee relationship changes.
Label the reviewer and assignee separately; their lines must not overlap.
Add zoom in, zoom out, reset and drag-to-pan controls using inline JavaScript.
Zoom and pan the cards and connectors together, with a usable initial fit.
Keep keyboard-accessible controls and the text relationship list.
Keep the file self-contained and usable offline. No dependencies or network calls.
Do not modify the SQL files. Explain the diagram changes and anything uncertain.
