chore(orm): upgrade to hibernate 5.6.x

Required by Spring 6 (Jakarta EE)

refs #1698

pom.xml

@@ -10,7 +10,7 @@
     	<java.version>11</java.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <model.version>2.0.68</model.version> <!-- https://jitpack.io/#elimu-ai/model -->
-        <hibernate.version>5.5.7.Final</hibernate.version> <!-- https://repo.maven.apache.org/maven2/org/hibernate/ -->
+        <hibernate.version>5.6.0.Final</hibernate.version> <!-- https://repo.maven.apache.org/maven2/org/hibernate/ -->
         <jetty.version>10.0.21</jetty.version> <!-- https://repo.maven.apache.org/maven2/org/eclipse/jetty/ -->
         <spring.version>5.3.18</spring.version> <!-- https://repo.maven.apache.org/maven2/org/springframework/ -->
         <spring.security.version>5.6.2</spring.security.version> <!-- https://repo.maven.apache.org/maven2/org/springframework/security/ -->