Put every tmpfs path in one place both layers can read

Watchdogs/System/conf_cache_watchdog.sh

@@ -146,7 +146,11 @@ require_partnership
 [[ "${CONF_SYNC_ENABLED:-true}" != "true" ]] && exit 0
 [[ -z "${REMOTE_ID:-}"         ]]            && exit 0
 
-RAM_CACHE="/tmp/.cache/vv/d"
+# The exported variable, not a literal. This was hardcoded while load_config.sh already exported
+# CONF_RAM_CACHE_DIR, so the watchdog would have gone on watching an empty directory the moment
+# that path moved — and reported the cache healthy because nothing was ever missing from a
+# location nothing writes to.
+RAM_CACHE="$CONF_RAM_CACHE_DIR"
 SAVE_DIR="${PERSISTENT_CONF_CACHE:-}"
 
 # SAVE_DIR is rm -rf'd below and is built from ${SCRIPTS_DIR}. If that is ever unset the