Fix shebang probe rejecting valid interpreters when Supervisor API returns empty

The probe script requires bashio::addon.version to return non-empty output,
but the Supervisor API may not be ready during container init. This causes
all shebang candidates to be rejected even though the interpreter works fine.

Fix: output a 'PROBE_OK' marker when the script executes successfully but
the version is empty. Also check /.bashio-standalone.sh as fallback path
(some containers store it there instead of /usr/local/lib/).

Co-authored-by: alexbelgium <44178713+alexbelgium@users.noreply.github.com>

.templates/01-custom_script.sh

@@ -71,13 +71,16 @@ _rc=$?
 set -e
 
 if [ "$_rc" -ne 0 ] || [ -z "$_bv" ] || [ "$_bv" = "null" ]; then
-  if [ -f /usr/local/lib/bashio-standalone.sh ]; then
-    . /usr/local/lib/bashio-standalone.sh
-    _bv="$(bashio::addon.version)"
-  fi
+  for _sf in /usr/local/lib/bashio-standalone.sh /.bashio-standalone.sh; do
+    if [ -f "$_sf" ]; then
+      . "$_sf"
+      _bv="$(bashio::addon.version 2>/dev/null || true)"
+      break
+    fi
+  done
 fi
 
-echo "$_bv"
+echo "${_bv:-PROBE_OK}"
 '
 
 validate_shebang() {

.templates/ha_entrypoint.sh

@@ -90,14 +90,17 @@ _rc=$?
 set -e
 
 if [ "$_rc" -ne 0 ] || [ -z "$_bv" ] || [ "$_bv" = "null" ]; then
-  if [ -f /usr/local/lib/bashio-standalone.sh ]; then
-    # shellcheck disable=SC1091
-    . /usr/local/lib/bashio-standalone.sh
-    _bv="$(bashio::addon.version)"
-  fi
+  for _sf in /usr/local/lib/bashio-standalone.sh /.bashio-standalone.sh; do
+    if [ -f "$_sf" ]; then
+      # shellcheck disable=SC1090
+      . "$_sf"
+      _bv="$(bashio::addon.version 2>/dev/null || true)"
+      break
+    fi
+  done
 fi
 
-echo "$_bv"
+echo "${_bv:-PROBE_OK}"
 '
 
 validate_shebang() {