Invalid repo snapshot updates in projects

[achilleas-k]

I've noticed recently that the snapshot update job will update repository configurations in the projects with invalid snapshot URLs. For example, this PR in images updated the server-updates repo in RHEL 7.9 to 20241107 (https://rpmrepo.osbuild.org/v2/mirror/rhvpn/el7/el7-x86_64-server-updates-7.9-20241107), but

curl -s https://rpmrepo.osbuild.org/v2/enumerate/ | grep el7-x86_64-server-updates-7.9-20241107

shows nothing.

To verify:

curl -s https://rpmrepo.osbuild.org/v2/enumerate/ | grep el7-x86_64-server-updates-7.9-2024
  "el7-x86_64-server-updates-7.9-20240415",
  "el7-x86_64-server-updates-7.9-20240501",
  "el7-x86_64-server-updates-7.9-20240502",
  "el7-x86_64-server-updates-7.9-20240508",
  "el7-x86_64-server-updates-7.9-20240513",
  "el7-x86_64-server-updates-7.9-20240514",
  "el7-x86_64-server-updates-7.9-20240515",
  "el7-x86_64-server-updates-7.9-20240522",
  "el7-x86_64-server-updates-7.9-20240531",
  "el7-x86_64-server-updates-7.9-20240601",
  "el7-x86_64-server-updates-7.9-20240615",
  "el7-x86_64-server-updates-7.9-20240626",
  "el7-x86_64-server-updates-7.9-20240701",
  "el7-x86_64-server-updates-7.9-20240715",
  "el7-x86_64-server-updates-7.9-20240801",