Update DocumentPrinter model to adjust 'updatedAt' and 'connectedAt' fields

- Added a new 'updatedAt' field for tracking the last update timestamp.
- Replaced the existing 'updatedAt' field with 'connectedAt' to accurately reflect the connection time.
- Ensured both fields are read-only and properly formatted for display in the UI.

src/database/models/DocumentPrinter.js

@@ -91,6 +91,13 @@ export const DocumentPrinter = {
       readOnly: true,
       columnWidth: 180
     },
+    {
+      name: 'updatedAt',
+      label: 'Updated At',
+      type: 'dateTime',
+      readOnly: true,
+      columnWidth: 175
+    },
     {
       name: 'name',
       label: 'Name',
@@ -99,13 +106,15 @@ export const DocumentPrinter = {
       columnWidth: 200,
       columnFixed: 'left'
     },
+
     {
-      name: 'updatedAt',
+      name: 'connectedAt',
-      label: 'Updated At',
+      label: 'Connected At',
       type: 'dateTime',
       readOnly: true,
       columnWidth: 175
     },
+
     {
       name: 'state',
       label: 'Status',
@@ -115,13 +124,7 @@ export const DocumentPrinter = {
       readOnly: true,
       columnWidth: 260
     },
-    {
+
-      name: 'connectedAt',
-      label: 'Connected At',
-      type: 'dateTime',
-      readOnly: true,
-      columnWidth: 175
-    },
     {
       name: 'online',
       label: 'Online',