feat: add role mappings for SAML configuration (#1210)

packages/backend/src/db/migrations/20230811142340_create_saml_auth_providers_role_mappings.ts

@@ -0,0 +1,24 @@
+import { Knex } from 'knex';
+
+export async function up(knex: Knex): Promise<void> {
+  return knex.schema.createTable(
+    'saml_auth_providers_role_mappings',
+    (table) => {
+      table.uuid('id').primary().defaultTo(knex.raw('gen_random_uuid()'));
+      table
+        .uuid('saml_auth_provider_id')
+        .references('id')
+        .inTable('saml_auth_providers');
+      table.uuid('role_id').references('id').inTable('roles');
+      table.string('remote_role_name').notNullable();
+
+      table.unique(['saml_auth_provider_id', 'remote_role_name']);
+
+      table.timestamps(true, true);
+    }
+  );
+}
+
+export async function down(knex: Knex): Promise<void> {
+  return knex.schema.dropTable('saml_auth_providers_role_mappings');
+}