feat: populate system columns for created/updated

packages/nocodb/src/db/BaseModelSqlv2.ts

@@ -5600,10 +5600,14 @@ class BaseModelSqlv2 {
     model?: Model;
     knex?: XKnex;
   }) {
-    const columnName = 'updated_at';
+    const columnName = await model.getColumns().then((columns) => {
+      return columns.find((c) => c.uidt === UITypes.LastModifiedTime)?.column_name;
+    });
+
+    if(!columnName) return;
 
     const qb = knex(model.table_name).update({
-      [columnName]: this.dbDriver.fn.now(),
+      [columnName]: Noco.ncMeta.now(),
     });
 
     for (const rowId of Array.isArray(rowIds) ? rowIds : [rowIds]) {

packages/nocodb/src/services/columns.service.ts

@@ -1692,10 +1692,10 @@ export class ColumnsService {
           // else create a new column in meta and db
           const existingColumn = await table.getColumns().then((col) => {
             return col.find(
-              (c) =>
-                c.uidt === colBody.uidt ||
-                c.column_name ===
-                  (c.uidt === UITypes.CreateTime ? 'created_at' : 'updated_at'),
+              (c) => c.uidt === colBody.uidt && c.system,
+              // ||
+              // c.column_name ===
+              //   (c.uidt === UITypes.CreateTime ? 'created_at' : 'updated_at'),
             );
           });
 
@@ -1741,6 +1741,17 @@ export class ColumnsService {
               await sqlMgr.sqlOpPlus(source, 'tableUpdate', tableUpdateBody);
             }
 
+            const title = getUniqueColumnAliasName(
+              table.columns,
+              UITypes.CreateTime ? 'CreatedAt' : 'UpdatedAt',
+            );
+
+            await Column.insert({
+              ...colBody,
+              title,
+              system: 1,
+              fk_model_id: table.id,
+            });
             await Column.insert({
               ...colBody,
               fk_model_id: table.id,