Add CORE-specific datetime for equity payments

in case payments are added to CORE on a later date, want to keep
original timestamp separate

rattail_corepos/importing/corepos/db.py

@@ -269,6 +269,7 @@ class MemberEquityPaymentImporter(FromCOREPOS, corepos_importing.model.MemberEqu
         'corepos_transaction_number',
         'corepos_transaction_id',
         'corepos_department_number',
+        'corepos_datetime',
     ]
 
     def setup(self):
@@ -319,20 +320,20 @@ class MemberEquityPaymentImporter(FromCOREPOS, corepos_importing.model.MemberEqu
                         card_number, stock_purchase)
             return
 
-        received = stock_purchase.datetime
-        if received:
-            received = self.app.localtime(received)
-            received = self.app.make_utc(received)
+        dt = stock_purchase.datetime
+        if dt:
+            dt = self.app.make_utc(self.app.localtime(dt))
 
         return {
             'member_uuid': member.uuid,
             'amount': stock_purchase.amount,
-            'received': received,
+            'received': dt,
             'transaction_identifier': stock_purchase.transaction_number,
             'corepos_card_number': stock_purchase.card_number,
             'corepos_transaction_number': stock_purchase.transaction_number,
             'corepos_transaction_id': stock_purchase.transaction_id,
             'corepos_department_number': stock_purchase.department_number,
+            'corepos_datetime': dt,
         }
 
     def create_object(self, key, host_data):

rattail_corepos/importing/model.py

@@ -90,6 +90,7 @@ class MemberEquityPaymentImporter(importing.model.MemberEquityPaymentImporter):
             'corepos_transaction_number',
             'corepos_transaction_id',
             'corepos_department_number',
+            'corepos_datetime',
         ],
     }