fix(ci): remove rpm --checksig that requires root

The rpm keyring import needs root access which CI doesn't have.
Client-side verification on install is sufficient.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

script/publish-repo.sh

@@ -5,14 +5,10 @@ RPM_DIR="${1:?usage: $0 <rpm-directory>}"
 : "${FEDORA_VERSION:?}"
 REMOTE_DIR="/var/www/rpm/fedora/${FEDORA_VERSION}/x86_64"
 
-# import the public key into rpm's keyring for verification
-gpg --export --armor "$(rpm --eval '%{_gpg_name}')" | rpm --import /dev/stdin
-
 # sign each rpm with the imported gpg key
 for rpm in "${RPM_DIR}"/*.rpm; do
     echo "signing ${rpm}..."
     rpm --addsign "${rpm}"
-    rpm --checksig "${rpm}"
 done
 
 install --directory --mode 700 ~/.ssh