Time unification

inventory-server/scripts/import-from-prod.js

@@ -23,6 +23,17 @@ const IMPORT_STOCK_SNAPSHOTS = true;
 const INCREMENTAL_UPDATE = process.env.INCREMENTAL_UPDATE !== 'false';  // Default to true unless explicitly set to false
 
 // SSH configuration
+// Current UTC offset of America/Chicago ('-05:00' or '-06:00'), DST-aware.
+function currentChicagoOffset() {
+  const tzName = new Intl.DateTimeFormat('en-US', {
+    timeZone: 'America/Chicago',
+    timeZoneName: 'longOffset',
+  })
+    .formatToParts(new Date())
+    .find((p) => p.type === 'timeZoneName').value; // e.g. 'GMT-05:00'
+  return tzName.replace('GMT', '') || '+00:00';
+}
+
 const sshConfig = {
   ssh: {
     host: process.env.PROD_SSH_HOST,
@@ -40,7 +51,12 @@ const sshConfig = {
     password: process.env.PROD_DB_PASSWORD,
     database: process.env.PROD_DB_NAME,
     port: process.env.PROD_DB_PORT || 3306,
-    timezone: '-05:00', // mysql2 driver timezone — corrected at runtime via adjustDateForMySQL() in utils.js
+    // DATETIMEs on this server store Central wall-clock. Use the CURRENT
+    // Chicago offset (DST-aware) so both inbound parsing and outbound
+    // serialization are correct in winter (CST=-06:00) and summer
+    // (CDT=-05:00). adjustDateForMySQL() in utils.js remains as a runtime
+    // safety net (its correction is 0 when this offset matches the server).
+    timezone: currentChicagoOffset(),
   },
   localDbConfig: {
     // PostgreSQL config for local