Split up calculate script into useable pieces

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

@@ -0,0 +1,51 @@
+const mysql = require('mysql2/promise');
+const path = require('path');
+require('dotenv').config({ path: path.resolve(__dirname, '../../..', '.env') });
+
+// Database configuration
+const dbConfig = {
+    host: process.env.DB_HOST,
+    user: process.env.DB_USER,
+    password: process.env.DB_PASSWORD,
+    database: process.env.DB_NAME,
+    waitForConnections: true,
+    connectionLimit: 10,
+    queueLimit: 0,
+    // 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'
+    ]
+};
+
+// Create a single pool instance to be reused
+const pool = mysql.createPool(dbConfig);
+
+async function getConnection() {
+    return await pool.getConnection();
+}
+
+async function closePool() {
+    await pool.end();
+}
+
+module.exports = {
+    dbConfig,
+    getConnection,
+    closePool
+};