fix: close internal semantic review gaps

scripts/vector-backup.sh

@@ -28,6 +28,9 @@ output_name=$(basename "$output")
 [ -d "$output_dir" ] || { echo "backup destination directory does not exist" >&2; exit 2; }
 
 expected_volume_name="${project_name}_${volume_role}"
+script_dir=$(CDPATH= cd "$(dirname "$0")" && pwd)
+. "$script_dir/lib/vector-operation-lock.sh"
+vector_operation_lock_init
 
 resolve_volume() {
   names=$(docker volume ls \
@@ -55,24 +58,32 @@ validate_volume_metadata() {
   [ "${3-}" = "$volume_role" ] || { echo "volume metadata role label mismatch" >&2; exit 2; }
 }
 
-volume_name=$(resolve_volume)
-validate_volume_metadata "$volume_name"
-
-running_container=$(docker compose --project-name "$project_name" ps --status running -q qdrant)
 restart_qdrant=0
 temporary_output=
 cleanup() {
   status=$?
+  trap - EXIT HUP INT TERM
   if [ -n "${temporary_output:-}" ] && [ -e "${temporary_output:-}" ]; then
     rm -f "$temporary_output"
   fi
   if [ "$restart_qdrant" -eq 1 ]; then
-    docker compose --project-name "$project_name" start qdrant >/dev/null
+    if ! docker compose --project-name "$project_name" start qdrant >/dev/null; then
+      echo "Unable to restart Qdrant after backup" >&2
+      [ "$status" -ne 0 ] || status=1
+    fi
+  fi
+  if ! release_vector_operation_lock; then
+    [ "$status" -ne 0 ] || status=1
   fi
   exit "$status"
 }
 trap cleanup EXIT HUP INT TERM
 
+acquire_vector_operation_lock
+volume_name=$(resolve_volume)
+validate_volume_metadata "$volume_name"
+running_container=$(docker compose --project-name "$project_name" ps --status running -q qdrant)
+
 if [ -n "$running_container" ]; then
   docker compose --project-name "$project_name" stop qdrant >/dev/null
   restart_qdrant=1