fix: keep setup wizard preflight successful

deploy/install.sh

@@ -210,7 +210,7 @@ prepare_java() {
     ln -s "$system_home" "$JAVA_STAGED_DIR"
     log "Using existing Java 17 runtime at $system_home"
     "$JAVA_STAGED_DIR/bin/java" -version
-    return
+    return 0
   fi
   log "No local Java 17 runtime found; downloading the official Azul Java 17 runtime"
   api="https://api.azul.com/metadata/v1/zulu/packages/?java_version=17&os=linux&arch=$(azul_arch)&archive_type=tar.gz&java_package_type=jre&release_status=ga&availability_types=CA&latest=true"
@@ -388,7 +388,7 @@ configure_database() {
     DB_URL='jdbc:mysql://setup.invalid:3306/kaidi_finance'
     DB_USERNAME=setup_pending
     DB_PASSWORD=setup_pending
-    return
+    return 0
   fi
   if [ "$REINSTALL" = true ]; then
     [ -s "$CONFIG_ROOT/kaidi.env" ] || die "KAIDI_REINSTALL needs the existing $CONFIG_ROOT/kaidi.env"
@@ -403,7 +403,7 @@ configure_database() {
   if [ -n "$DB_URL" ]; then
     [ -n "$DB_USERNAME" ] && [ -n "$DB_PASSWORD" ] \
       || die "KAIDI_DB_USERNAME and KAIDI_DB_PASSWORD are required with KAIDI_DB_URL"
-    return
+    return 0
   fi
   [ "$REINSTALL" != true ] \
     || die "KAIDI_REINSTALL needs database credentials in the existing installation or command environment"
@@ -436,7 +436,7 @@ database_name() {
 
 preflight_database() {
   local client host port name version table
-  [ "$SETUP_WIZARD" != true ] || return
+  [ "$SETUP_WIZARD" != true ] || return 0
   case "$DB_URL" in
     jdbc:mysql://*) ;;
     *) die "KAIDI_DB_URL must start with jdbc:mysql://" ;;
@@ -541,7 +541,7 @@ wait_for_health() {
   local attempts=0
   while [ "$attempts" -lt 60 ]; do
     if curl -fsS "$HEALTH_URL" | jq -e '.status == "UP"' >/dev/null 2>&1; then
-      return
+      return 0
     fi
     attempts=$((attempts + 1))
     sleep 2