Implement volume metrics for the W token NTT dashboard

[M-Picco]

Parent task: #1494

Notion doc: https://www.notion.so/xlabsxyz/NTT-Monitoring-6f51edf7394b4c89b34a7e042a6f2fa6?pvs=4#d1d6bcea3bfe4d018de0d28df7acc7ee

Metrics to implement

• Transfer count of tokens moving in cross-chain flows. If supported by Grafana show as a Sankey chart; if not, use a double entry table with chains as columns and rows
• Volume of tokens moving in cross-chain flows. If supported by Grafana show as a Sankey chart; if not, use a double entry table with chains as columns and rows
• Transfers and redeems over time cross-chain (line graph)
• How much W transferred in a given time period (cross-chain only)
• How many transfers in a given time period (cross-chain only)
• Average transfer size in a given time period (cross-chain only)
• Median transfer size in a given (cross-chain only)

[SamantaCasal]

Dashboard: https://grafana.ops.xlabs.xyz/d/adpdfzq9tdloga/ntt-monitoring?orgId=1&from=now-30d&to=now

• Transfer count of tokens moving in cross-chain flows.

• Volume of tokens moving in cross-chain flows.

• How much W transferred in a given time period (cross-chain only)

• How many transfers in a given time period (cross-chain only)

• Average transfer size in a given time period (cross-chain only)

• Median transfer size in a given (cross-chain only)