Add handling of accepted ToS on account level

migrations/V132__add_tos.sql

@@ -0,0 +1,16 @@
+create table terms_of_service
+(
+    version    smallint auto_increment,
+    valid_from timestamp not null comment 'The start date when this ToS version is applied. May point into the future to prepare ToS changes.',
+    content    text      not null comment 'Markdown formatted text',
+    constraint terms_of_service_pk
+        primary key (version)
+);
+
+create index terms_of_service_valid_from_index
+    on terms_of_service (valid_from);
+
+alter table login
+    add accepted_tos smallint null comment 'Point to the last ToS the user has explicitely accepted',
+    add constraint login_terms_of_service_version_fk
+        foreign key (accepted_tos) references terms_of_service (version);