Add support for Static-CT Logs

[Knight1]

Filippo added the first production static-ct Logs to the google ct log list for inclusion.
https://issues.chromium.org/issues/416691330

2025/05/13 07:28:45 ct-watcher.go:290: Could not get STH for 'https://tuscolo2025h2.sunlight.geomys.org': got HTTP Status "404 Not Found"
2025/05/13 07:28:45 ct-watcher.go:244: Worker for 'https://tuscolo2025h2.sunlight.geomys.org' failed - could not fetch STH
2025/05/13 07:28:45 ct-watcher.go:245: Stopping worker for CT log: https://tuscolo2025h2.sunlight.geomys.org

[mimi89999]

It seems that https://github.com/google/certificate-transparency-go does not intend to wdd support for tile logs (google/certificate-transparency-go#1669).

There are some other clients that could be uses for that:
https://pkg.go.dev/filippo.io/sunlight#Client
https://github.com/transparency-dev/tesseract/blob/63fd586abdaa69f9308d33c364577f1c638dd2a7/cmd/client/main.go

[AndreC10002]

Since around 2025-12-08 we are not receiving any Let's Encrypt certificates anymore. That is caused by Let's Encrypt stopping its RFC 6962 logs and will only running static CT logs. This situation makes support LE static CT logs very important.

[mimi89999]

I proposed a PR some time ago: #79

You can try my Python lib: https://github.com/CERT-Polska/ct-moniteur . It supports both static tiled logs and classic logs. If you need a WS API, it can easily be added.