feat: implement core dispensing, identity, and integration modules with authentication middleware

alter_db.js

@@ -1,18 +1,24 @@
 const { Pool } = require('pg');
+require('dotenv').config();
 
 const pool = new Pool({
-  connectionString: 'postgres://postgres:csh%402018@localhost:5432/ai_pharmacy'
+  connectionString: process.env.DATABASE_URL || 'postgres://postgres:csh%402018@localhost:5433/ai_pharmacy'
 });
 
 async function run() {
   try {
     await pool.query('ALTER TABLE stock_movements ADD COLUMN IF NOT EXISTS reason_code VARCHAR(100)');
     await pool.query('ALTER TABLE stock_movements ADD COLUMN IF NOT EXISTS notes TEXT');
-    console.log('Successfully added columns.');
+    await pool.query('ALTER TABLE products ADD COLUMN IF NOT EXISTS hsn_code VARCHAR(20)');
+    await pool.query('ALTER TABLE products ADD COLUMN IF NOT EXISTS tenant_id VARCHAR(50)');
+    await pool.query('ALTER TABLE drugs ADD COLUMN IF NOT EXISTS tenant_id VARCHAR(50)');
+    console.log('Successfully added missing database columns.');
   } catch (err) {
-    console.error('Error:', err);
+    console.error('Error altering database:', err);
   } finally {
     pool.end();
   }
 }
 run();
+
+