Introduces optimistic locking for project aggregate (#1127)

Concurrent modification of projects is now possible due to the introduction
of an optimistic locking strategy introducing a version for every row entry
for the project aggregate.

In case of a concurrent write modification, an exception is thrown and
the retry handler of the flux jumps in with the default retry strategy we have
currently configured.

Author: sven1103

project-management/src/main/java/life/qbic/projectmanagement/domain/model/project/Project.java

@@ -16,6 +16,7 @@
 import jakarta.persistence.OneToMany;
 import jakarta.persistence.PostLoad;
 import jakarta.persistence.Table;
+import jakarta.persistence.Version;
 import java.time.Instant;
 import java.util.ArrayList;
 import java.util.List;
@@ -37,6 +38,9 @@ public class Project {
   @EmbeddedId
   private ProjectId projectId;
 
+  @Version
+  private int version;
+
   @Embedded
   private ProjectIntent projectIntent;