extend reference field (#452)

* extend reference field

* update dependencies

* update snapstho

---------

Co-authored-by: Max Gruenfelder <maximilian.gruenfelder@scheer-group.com>

Author: soccermax

.gitignore

@@ -32,7 +32,7 @@ coverage
 Claude.md
 
 # temp
-temp/
+tmp/
 
 # test reports
 reports/

db/Event.cds

@@ -16,7 +16,7 @@ entity Event: cuid {
     type: String not null;
     subType: String not null;
     referenceEntity: String;
-    referenceEntityKey: UUID;
+    referenceEntityKey: String;
     status: Status default 0 not null;
     payload: LargeString;
     attempts: Integer default 0 not null;