fix(ci): collect the package manager logs before the slow node probes

diagnostics.sh runs under a 900-second deadline that the sweep deadline
can shorten further. The package manager section came last, after the NFS,
ganesha backtrace and controller probes, so a cut-off run would have lost
exactly the log this collection exists for. It now runs first.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

scripts/tests/deploy/swarm/utils/collect/diagnostics.sh

@@ -32,6 +32,12 @@ dexec() {
 	timeout 30 docker exec "$@"
 }
 
+sep "node-package-manager" "package manager logs (a failed download names the mirror, the URL and the status)"
+for node in "${MGR}" "${WRK1}" "${WRK2}" "${NFS_SERVER}" "${BACKUP_NODE}"; do
+	echo "=== ${node} ==="
+	dexec "${node}" sh -c "tail -n 3000 /var/log/dnf5.log /var/log/dnf.librepo.log 2>&1"
+done
+
 for node in "${MGR}" "${WRK1}" "${WRK2}"; do
 	sep "compose-tree" "${node}: /opt/compose tree"
 	dexec "${node}" find /opt/compose -maxdepth 3 -type f -name '*.yml' 2>/dev/null
@@ -183,12 +189,6 @@ for node in "${MGR}" "${WRK1}" "${WRK2}" "${NFS_SERVER}" "${BACKUP_NODE}"; do
 	dexec "${node}" sh -c "ls -l /dev/loop* 2>&1" || echo "(no loop nodes in /dev)"
 done
 
-sep "node-package-manager" "package manager logs (a failed download names the mirror, the URL and the status)"
-for node in "${MGR}" "${WRK1}" "${WRK2}" "${NFS_SERVER}" "${BACKUP_NODE}"; do
-	echo "=== ${node} ==="
-	dexec "${node}" sh -c "tail -n 3000 /var/log/dnf5.log /var/log/dnf.librepo.log 2>&1"
-done
-
 if [ -n "${OUT}" ] && [ "$(find "${OUT}" -type f 2>/dev/null | wc -l)" -eq 0 ]; then
 	echo "stack diagnostics: captured no files under ${OUT}" >&9
 fi