Add hibernate support for printing Specification/TypedQuery to string (for debug purposes) (#2213)

Signed-off-by: Avgustin Marinov <Avgustin.Marinov@bosch.com>

hawkbit-repository/hawkbit-repository-jpa-eclipselink/src/main/java/org/eclipse/hawkbit/repository/jpa/Utils.java

@@ -0,0 +1,29 @@
+/**
+ * Copyright (c) 2025 Contributors to the Eclipse Foundation
+ *
+ * This program and the accompanying materials are made
+ * available under the terms of the Eclipse Public License 2.0
+ * which is available at https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.eclipse.hawkbit.repository.jpa;
+
+import jakarta.persistence.TypedQuery;
+
+import lombok.NoArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.eclipse.persistence.config.PersistenceUnitProperties;
+import org.eclipse.persistence.jpa.JpaQuery;
+
+@NoArgsConstructor(access = lombok.AccessLevel.PRIVATE)
+@Slf4j
+public class Utils {
+
+    public static String toSql(final TypedQuery<?> typedQuery) {
+        typedQuery.setParameter(PersistenceUnitProperties.MULTITENANT_PROPERTY_DEFAULT, "DEFAULT");
+        // executes the query - otherwise the SQL string is not generated
+        typedQuery.getResultList();
+        return typedQuery.unwrap(JpaQuery.class).getDatabaseQuery().getSQLString();
+    }
+}