Add problem report for invalid custdata person number sequence

rattail_corepos/templates/mail/corepos_problems_invalid_person_numbers.html.mako

@@ -0,0 +1,24 @@
+## -*- coding: utf-8; -*-
+<%inherit file="/base_problems.html.mako" />
+
+<%def name="summary()">
+  <p>
+    There are ${len(problems)} customer records which have unexpected
+    person number sequence.&nbsp; This may throw off some logic which
+    expects the sequence to be valid.&nbsp; Please investigate and fix
+    at your convenience.
+  </p>
+</%def>
+
+<%def name="simple_row(obj, i)">
+  <% customer, expected_person_number = obj %>
+  <tr>
+    <td>${customer.card_number}</td>
+    <td>${customer.first_name}</td>
+    <td>${customer.last_name}</td>
+    <td>${expected_person_number}</td>
+    <td>${customer.person_number}</td>
+  </tr>
+</%def>
+
+${self.simple_table(["Card #", "First Name", "Last Name", "Expected Person #", "Current Person #"])}