fix schema

Co-authored-by: Christoph <tobi@urpost.de>

src/main/resources/schema-h2.sql

@@ -8,3 +8,10 @@ CREATE TABLE event
     event_type    VARCHAR(32),
     event_payload VARCHAR(2500)
 );
+
+CREATE TABLE invite
+(
+    invite_id   INT PRIMARY KEY AUTO_INCREMENT,
+    group_id    VARCHAR(36) NOT NULL,
+    invite_link VARCHAR(36) NOT NULL
+);