fix(deploy): prepare server auth projection root

scripts/test-task13-runtime-fixtures.sh

@@ -83,15 +83,21 @@ else
   original_task13_run_logged="$(declare -f task13_run_logged)"
   ownership_calls="$fixture/server-auth-ownership.calls"
   task13_run_logged() {
-    printf '%s\n' "$*" >"$ownership_calls"
+    printf '%s\n' "$*" >>"$ownership_calls"
   }
-  task13_prepare_server_auth_canonical_root
+  task13_prepare_server_auth_roots
   grep -Fxq -- \
     "prepare server authentication canonical root sudo -n -- install -d -o 0 -g 0 -m 0700 -- $TASK13_AUTH_ROOT" \
     "$ownership_calls" || {
       echo "server auth fixture does not prepare a root-owned private canonical directory" >&2
       exit 1
     }
+  grep -Fxq -- \
+    "prepare server authentication runtime root sudo -n -- install -d -o 10001 -g 10001 -m 0700 -- $TASK13_AUTH_RUNTIME_ROOT" \
+    "$ownership_calls" || {
+      echo "server auth fixture does not prepare the private runtime projection directory" >&2
+      exit 1
+    }
   unset -f task13_run_logged
   eval "$original_task13_run_logged"
   compose_files=(