feat: Init backend

legalconsenthub-backend/src/main/resources/db/migrations/001-schema.sql

@@ -0,0 +1,34 @@
+create table application_form
+(
+    created_at  timestamp(6) not null,
+    modified_at timestamp(6) not null,
+    id          uuid         not null,
+    primary key (id)
+);
+
+create table form_element_options
+(
+    employee_data_category tinyint      not null check (employee_data_category between 0 and 3),
+    processing_purpose     tinyint      not null check (processing_purpose between 0 and 3),
+    form_element_id        uuid         not null,
+    label                  varchar(255) not null,
+    option_value           varchar(255) not null
+);
+
+create table form_element
+(
+    type                tinyint not null check (type between 0 and 4),
+    application_form_id uuid    not null,
+    id                  uuid    not null,
+    primary key (id)
+);
+
+alter table if exists form_element_options
+    add constraint FKnq0lpby5nspv1xi27n9el6us6
+    foreign key (form_element_id)
+    references form_element;
+
+alter table if exists form_element
+    add constraint FKdniyq3l10lncw48tft15js5gb
+    foreign key (application_form_id)
+    references application_form;