1st approach for projects, items, db structure

server/src/db/migrations/0004-create-items-table.ts

@@ -0,0 +1,40 @@
+import type { Migration } from './types.js';
+
+export const migration: Migration = {
+  name: '0004-create-items-table',
+  up: async (client) => {
+    await client.query('CREATE EXTENSION IF NOT EXISTS "pgcrypto";');
+
+    await client.query(`
+      DO $$
+      BEGIN
+        CREATE TYPE item_status AS ENUM ('active', 'rejected');
+      EXCEPTION
+        WHEN duplicate_object THEN NULL;
+      END$$;
+    `);
+
+    await client.query(`
+      CREATE TABLE IF NOT EXISTS items (
+        id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+        project_id UUID NOT NULL REFERENCES projects(id) ON DELETE CASCADE,
+        manufacturer VARCHAR(120),
+        model VARCHAR(150) NOT NULL,
+        source_url_id UUID REFERENCES urls(id) ON DELETE SET NULL,
+        status item_status NOT NULL DEFAULT 'active',
+        note TEXT,
+        attributes JSONB NOT NULL DEFAULT '{}'::jsonb,
+        created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+        updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+      );
+    `);
+
+    await client.query(`
+      CREATE INDEX IF NOT EXISTS items_project_id_idx ON items (project_id);
+    `);
+
+    await client.query(`
+      CREATE INDEX IF NOT EXISTS items_source_url_id_idx ON items (source_url_id);
+    `);
+  }
+};