Update gov.txt directly from zone

[h-m-f-t]

In #107, we updated gov.txt (a copy of the zone file_ each day from the version we publish each day to CZDS. Instead of pulling once daily from a copy, we should pull from our DNS provider, Cloudflare, which we could also poll more frequently since the provenance of the data is the real source. Let's start with once every 6 hours.

One question to answer is our commit approach. We want to see the individual commits but summarize them into one (like a PR, though we don't want to need to approve a PR).

Acceptance criteria

• Get read-only API token from Cameron
• Decide if we want to strip the zone file's comment header (the order of this file is slightly different than CZDS)
• gov.txt is updated daily via Cloudflare
  • Merge every 24 hours
• ADR is updated with any necessary changes based on this work

Additional Context

• Fork dotgov-data repo for this ticket.
• The Program can more easily see all the changes in the zone file on demand.
• Security: CISA issued an ED requiring DNS updates. This gives the program visibility into these changes.

[PaulKuykendall]

@h-m-f-t - in Fireside, we reviewed this and wanted your feedback on the actual priority on this item. It's fairly high in the backlog now.

[h-m-f-t]

It's true this isn't super urgent. However, one of my reasons for it being high in the backlog is that it is similar to the work recently done to archive the CZDS zone file and so it may be easy to pick up.