Added updated_at and updated_by columns for embeds (#172)

* Added updated_at and updated_by columns for embeds
- Will be changed to NOT NULL in future updates (updated_by)

* Removed pre-set for updated_by column. Will be set later with NOT NULL.

src/db/migrations/20240821135008_embeds_add_updated_by_columns.ts

@@ -0,0 +1,18 @@
+import {Knex} from 'knex';
+
+export async function up(knex: Knex): Promise<void> {
+    return knex.raw(`
+        ALTER TABLE embeds
+            ADD COLUMN updated_by TEXT,
+            ADD COLUMN updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW();
+        CREATE INDEX embeds_updated_at_idx ON embeds USING BTREE (updated_at);
+    `);
+}
+
+export async function down(knex: Knex): Promise<void> {
+    return knex.raw(`
+        ALTER TABLE embeds
+            DROP COLUMN updated_at,
+            DROP COLUMN updated_by;
+    `);
+}