Start migrating and fixing calculate scripts

inventory-server/scripts/metrics/utils/db.js

@@ -1,4 +1,4 @@
-const mysql = require('mysql2/promise');
+const { Pool } = require('pg');
 const path = require('path');
 require('dotenv').config({ path: path.resolve(__dirname, '../../..', '.env') });
 
@@ -8,36 +8,24 @@ const dbConfig = {
     user: process.env.DB_USER,
     password: process.env.DB_PASSWORD,
     database: process.env.DB_NAME,
-    waitForConnections: true,
-    connectionLimit: 10,
-    queueLimit: 0,
+    port: process.env.DB_PORT || 5432,
+    ssl: process.env.DB_SSL === 'true',
     // Add performance optimizations
-    namedPlaceholders: true,
-    maxPreparedStatements: 256,
-    enableKeepAlive: true,
-    keepAliveInitialDelay: 0,
-    // Add memory optimizations
-    flags: [
-        'FOUND_ROWS',
-        'LONG_PASSWORD',
-        'PROTOCOL_41',
-        'TRANSACTIONS',
-        'SECURE_CONNECTION',
-        'MULTI_RESULTS',
-        'PS_MULTI_RESULTS',
-        'PLUGIN_AUTH',
-        'CONNECT_ATTRS',
-        'PLUGIN_AUTH_LENENC_CLIENT_DATA',
-        'SESSION_TRACK',
-        'MULTI_STATEMENTS'
-    ]
+    max: 10, // connection pool max size
+    idleTimeoutMillis: 30000,
+    connectionTimeoutMillis: 60000
 };
 
 // Create a single pool instance to be reused
-const pool = mysql.createPool(dbConfig);
+const pool = new Pool(dbConfig);
+
+// Add event handlers for pool
+pool.on('error', (err, client) => {
+    console.error('Unexpected error on idle client', err);
+});
 
 async function getConnection() {
-    return await pool.getConnection();
+    return await pool.connect();
 }
 
 async function closePool() {