feat(groups): add fail-closed admission management

packages/database/src/schema.ts

@@ -62,6 +62,40 @@ export const users = pgTable(
   (table) => [uniqueIndex("users_discord_user_id_uidx").on(table.discordUserId)],
 );
 
+export const groups = pgTable(
+  "groups",
+  {
+    id: uuid("id").primaryKey().defaultRandom(),
+    name: varchar("name", { length: 50 }).notNull(),
+    slug: varchar("slug", { length: 50 }).notNull(),
+    description: text("description"),
+    accessEnabled: boolean("access_enabled").notNull().default(false),
+    isDefault: boolean("is_default").notNull().default(false),
+    ...timestamps(),
+  },
+  (table) => [
+    uniqueIndex("groups_slug_uidx").on(sql`lower(${table.slug})`),
+    uniqueIndex("groups_one_default_uidx").on(table.isDefault).where(sql`${table.isDefault} = true`),
+  ],
+);
+
+export const userGroupMemberships = pgTable(
+  "user_group_memberships",
+  {
+    userId: uuid("user_id")
+      .notNull()
+      .references(() => users.id, { onDelete: "cascade" }),
+    groupId: uuid("group_id")
+      .notNull()
+      .references(() => groups.id, { onDelete: "cascade" }),
+    createdAt: createdAt(),
+  },
+  (table) => [
+    uniqueIndex("user_group_memberships_user_group_uidx").on(table.userId, table.groupId),
+    index("user_group_memberships_group_idx").on(table.groupId),
+  ],
+);
+
 export const minecraftAccounts = pgTable(
   "minecraft_accounts",
   {