feat: implement dispensing module with transaction-safe stock management, FEFO allocation, and H1 compliance reporting

update_batch.js

@@ -0,0 +1,7 @@
+const {Client} = require('pg'); 
+const client = new Client('postgres://postgres:csh%402018@localhost:5432/ai_pharmacy'); 
+client.connect().then(async () => { 
+  await client.query("UPDATE batches SET qty_on_hand = 10"); 
+  console.log('Updated all batches to 10 for testing'); 
+  process.exit(0); 
+});