#398: Table View Interactions

[ethanluc7]

Related to issue: #398

Summary

Enhances the table view to display visual key indicators (PK/FK) in the Attribute column and enable navigation from FK relationships to the ERD diagram modal with highlighted relationships.

Description of Changes

• Replaced the layout with two separate algorithms instead of just one:
  • Sugiyama — used for the full ERD view, respects FK relationships to produce a DAG-ordered layout
  • Grid — used for the focused FK chain, compactly arranges only the schemas in the selected relationship chain
• Added getLayoutedDiagram and getLayoutedElements to drive both layouts
• Introduced DiagramViewContext to manage modal open state and an optional focusField (schema + field name).
• RelationshipDiagramContent now accepts a focusField prop: when set, it traces the FK chain for that field, filters to only the relevant schemas/edges, and renders the compact grid layout with the relationship pre-highlighted. When unset, it renders the full ERD.
• Added two new utility functions (isFieldForeignKey, isFieldUniqueKey) to detect FK and unique key fields.

Readiness Checklist

• Self Review
  • I have performed a self review of code
  • I have run the application locally and manually tested the feature
  • I have checked all updates to correct typos and misspellings
• Formatting
  • Code follows the project style guide
  • Automated code formatters (ie. Prettier) have been run
• Local Testing
  • Successfully built all packages locally
  • Successfully ran all test suites, all unit and integration tests pass
• Updated Tests
  • Unit and integration tests have been added that describe the bug that was fixed or the features that were added
• Documentation
  • All new environment variables added to .env.schema file and documented in the README
  • All changes to server HTTP endpoints have open-api documentation
  • All new functions exported from their module have TSDoc comment documentation