[Network Statistics] Track filter-aware statistics view and workbook export

[mossy426-cdc]

Summary

Track the Network Statistics panel/view work visible in the local dev branch: summary counts, sectioned statistics tables, filter-aware recalculation, and workbook export.

Local evidence

• cypress/e2e/journeys/flows/network-statistics-panel.cy.ts
• cypress/e2e/journeys/datasets/profiles/network-statistics.ts
• cypress/fixtures/NetworkStatisticsNodes.csv
• cypress/fixtures/NetworkStatisticsLinks.csv
• src/app/contactTraceCommonServices/network-statistics.ts
• src/app/visualizationComponents/NetworkStatisticsComponent/network-statistics-plugin.component.ts
• src/app/visualizationComponents/NetworkStatisticsComponent/network-statistics-plugin.component.html
• src/app/visualizationComponents/NetworkStatisticsComponent/network-statistics-plugin.component.scss

Acceptance criteria

• 2D Network statistics wrapper shows the compact counts for nodes, visible links, and singleton nodes without exposing the full export/table controls in that wrapper.
• A dedicated Network Statistics view opens from the app view menu and renders the statistics table shell.
• Summary, Degree Distribution, Node Centrality, and Clusters sections are selectable and render stable table content.
• The table shell keeps usable pagination and width behavior for dense statistics tables.
• Statistics recalculate from the visible network after global filtering changes, including link-threshold changes.
• Export produces a workbook with Summary, Degree Distribution, Node Centrality, and Clusters sheets.
• Exported workbook sheets omit internal bookkeeping fields such as record_type, component_id, and componentCount.
• Cypress coverage remains passing for cypress/e2e/journeys/flows/network-statistics-panel.cy.ts.

Notes

This issue was created from local repo evidence on dev and should stay aligned with the existing network statistics service/component implementation and Cypress journey.