update: remove -debug packages whose package is gone

makepkg builds pkg-debug alongside an AUR package, and removing the
package leaves it behind: the migration that dropped asdf-vm left
asdf-vm-debug. Found by 30-upgrade-from-baseline at 0c0ddf5, whose
machine kept it where a fresh install has none.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/cleanup.bats

@@ -0,0 +1,33 @@
+#!/usr/bin/env bats
+
+load test_helper
+
+@test "95-cleanup removes -debug packages whose package is gone, and keeps the rest" {
+  # -Qqm lists the AUR packages; -Qq NAME prints what matches NAME, which for
+  # herdr is herdr-bin, as it provides herdr
+  stub pacman '
+case "$1" in
+  -Qqm) printf "%s\n" asdf-vm-debug cliamp cliamp-debug herdr-bin herdr-debug ;;
+  -Qq) case "$2" in cliamp) echo cliamp ;; herdr) echo herdr-bin ;; *) exit 1 ;; esac ;;
+esac'
+  stub sudo
+  stub flatpak
+
+  run bash "$REPO/updates.d/95-cleanup.sh" < /dev/null
+  [ "$status" -eq 0 ]
+  called sudo pacman -R --noconfirm asdf-vm-debug herdr-debug
+}
+
+@test "95-cleanup leaves -debug packages alone while their packages are installed" {
+  stub pacman '
+case "$1" in
+  -Qqm) printf "%s\n" cliamp cliamp-debug ;;
+  -Qq) [ "$2" = cliamp ] && echo cliamp ;;
+esac'
+  stub sudo
+  stub flatpak
+
+  run bash "$REPO/updates.d/95-cleanup.sh" < /dev/null
+  [ "$status" -eq 0 ]
+  [ -z "$(grep 'pacman -R ' "$STUB_LOG")" ]
+}