Selfhosted
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All those do is essentially call the Cloudflare API. They'll all work reasonably well. The linked Docker image for example is essentially doing the bulk of it in this bash script which they call from a cron and some other container init logic which I imagine is to do the initial update when the container starts.
Pick whatever is easiest and makes most sense for you. Even the archived Docker thing is so simple, I wouldn't worry about it being unmaintained because it can reasonably be called a finished product. It'll work until Cloudflare upgrades their API and shuts down the old one, which you'd get months to years of warning because of enterprise customers.
Personally, that's a trivial enough task I'd probably just custom-write a Python script to call their API. They even have a python library for their API. Probably like 50-100 lines long tops. I have my own DNS server and my DDNS "server" is a 25 lines PHP script, and the client is a curl command in a cronjob.
DDNS is a long solved and done problem. All the development is essentially just adding new providers.