feat: add stats routes

[dashcraft]

Working on stats routes, these are currently written while not having a local setup to test against.
I'll be testing over the next few days.

[cloudflare-workers-and-pages]

Deploying with    Cloudflare Pages

Latest commit:	cabf531
Status:	✅  Deploy successful!
Preview URL:	https://733c2d06.nft-storage-1at.pages.dev

View logs

[dashcraft]

This implements the materialized view implementation i discussed with @dchoi27. This should be good enough for 10's of millions of records. Locally, on a postgres instance with 15 million records, it takes roughly 10-13 seconds, sometimes closer to 6. This is much easier to refresh since it is all postgres side, but it is not the fastest solution. This solution is exact though, so numbers are trustworthy.

As noted in my conversation with @dchoi27, the more robust solution should this one be rendered too slow or not robust enough, would be to cash the previous values and programmatically calculate the flow values from the 2 diffed values (previous count and count in past 7 days, added together as current total count).

[dashcraft]

Fwiw on a timeseries database i have, this query takes 1.8s on 10 million records, so this is indicative that indexing plays a role in this query speed.

[alanshaw]

This LGTM, just a minor request to follow the existing naming convention for the metric names.

Also, in main we're now timing the queries so we can debug more easily as the data size grows - can you please rebase/merge with main and add the withTimeLog function call around your queries? 🙏