[db-wg] RDAP Conformance Level "cidr0"

Dear RIPE DB wg,

The RDAP for querying ip and network information on rdap.db.ripe.net is really useful.

Currently you support the rdapConformance level "rdap_level_0" and this is missing the CIDR or Prefix Information about the Length/Mask.

Other RIR have implemented a rdap conformance level "cidr0" for this:
* https://rdap.arin.net/registry/ip/9.9.9.9
* https://rdap.apnic.net/ip/1.1.1.1

with the desired information:
"cidr0_cidrs": [
{
"v4prefix": "1.1.1.0",
"length": 24
}
]

Information about the Origin ASN is also available by arin with "arin_originas0", which is also very helpful, but the format seems to be arin specific and not standardized.

May I suggest to also implement the cidr0 level, or even additionally the "origin as" for the RIPE DB RDAP?

Kind regards,
Benjamin