feat(notifications): User Notifications

backend/src/db/migrations/20250829203610_user-notifications.ts

@@ -0,0 +1,48 @@
+import { Knex } from "knex";
+
+import { TableName } from "../schemas";
+import { createOnUpdateTrigger, dropOnUpdateTrigger } from "../utils";
+
+export async function up(knex: Knex): Promise<void> {
+  if (!(await knex.schema.hasTable(TableName.UserNotifications))) {
+    const createTableSql = knex.schema
+      .createTable(TableName.UserNotifications, (t) => {
+        t.uuid("id").defaultTo(knex.fn.uuid());
+        t.uuid("userId").notNullable();
+
+        t.string("type").notNullable();
+        t.string("title").notNullable(); // Markdown
+        t.text("body").nullable(); // Markdown
+        t.string("link").nullable();
+        t.boolean("isRead").notNullable().defaultTo(false);
+
+        t.timestamps(true, true, true);
+
+        t.primary(["id", "createdAt"]);
+      })
+      .toString();
+
+    await knex.schema.raw(`
+        ${createTableSql} PARTITION BY RANGE ("createdAt");
+    `);
+
+    await knex.schema.raw(
+      `CREATE TABLE ${TableName.UserNotifications}_default PARTITION OF ${TableName.UserNotifications} DEFAULT`
+    );
+
+    await knex.schema.alterTable(TableName.UserNotifications, (t) => {
+      t.foreign("userId").references("id").inTable(TableName.Users).onDelete("CASCADE");
+
+      t.index("type");
+      t.index(["userId", "isRead"]);
+      t.index(["userId", "createdAt"]);
+    });
+
+    await createOnUpdateTrigger(knex, TableName.UserNotifications);
+  }
+}
+
+export async function down(knex: Knex): Promise<void> {
+  await knex.schema.dropTableIfExists(TableName.UserNotifications);
+  await dropOnUpdateTrigger(knex, TableName.UserNotifications);
+}