Prevent link rot in data files

[beatcracker]

We need something akin to https://github.com/lycheeverse/lychee-action to check for dead links in the data files.

Additionally, we could develop a custom tooling to check if telemetry configuration that is described in the data file is actually mentioned in the linked page (telemetry link property).

Example: if data files lists DISABLE_TELEMETRY env. var, this string should exist in the linked document.