feat: add core backend modules, inventory services, and patch scripts for AI Pharmacy API

scratch/test_register_flow.ts

@@ -0,0 +1,33 @@
+import { IdentityService } from '../src/modules/identity/service';
+import { CatalogueService } from '../src/modules/catalogue/service';
+import { pool } from '../src/db/pool';
+
+async function testRegister() {
+  const identityService = new IdentityService();
+  const catalogueService = new CatalogueService();
+
+  const hospitalId = 'hosp_test_' + Date.now();
+  const username = 'pharmacist_hosp_' + Date.now();
+
+  console.log(`Registering user ${username} for hospital ${hospitalId}...`);
+  const registered = await identityService.registerUser({
+    hospital_id: hospitalId,
+    username: username,
+    passwordPlain: 'Password@2026',
+    pharmacy_name: 'Test Hospital Pharmacy',
+    address: '123 Hospital St'
+  });
+
+  console.log('Registered User:', registered);
+
+  // Fetch stock catalogue for registered hospital pharmacy tenant
+  const drugs = await catalogueService.getAllDrugs(50, hospitalId);
+  console.log('Drugs returned for tenant:', drugs.length);
+  drugs.forEach((d: any) => {
+    console.log(` - ${d.brand_name} (${d.generic_name}) Total Stock: ${d.total_stock}`);
+  });
+
+  await pool.end();
+}
+
+testRegister().catch(console.error);