fix: retain only latest production backup

.gitea/workflows/ci.yml

@@ -80,6 +80,7 @@ jobs:
             alpine:3.20 sh -c 'tar -xf /src/release.tar -C /dst'
           docker compose up -d --build
           curl --fail --silent --show-error http://127.0.0.1:8000/api/health
+          find "$HOME/backups/miem_workers" -maxdepth 1 -type f -name 'miem_workers-*.sql' ! -path "$backup" -delete
           docker compose ps
           rm -f "$release"
           REMOTE