Add problem report for CORE phone numbers too long

rattail_corepos/templates/mail/corepos_problems_phone_numbers_too_long.html.mako

@@ -0,0 +1,19 @@
+## -*- coding: utf-8; -*-
+<%inherit file="/base_problems.html.mako" />
+
+<%def name="summary()">
+  <p>
+    There are ${len(problems)} member records which have a phone
+    number that is too long to properly fit in the `Customers`
+    table.&nbsp; Please investigate and fix at your convenience.
+  </p>
+</%def>
+
+<%def name="simple_row(member, i)">
+  <tr>
+    <td>${member.card_number}</td>
+    <td>${member.phone}</td>
+  </tr>
+</%def>
+
+${self.simple_table(["Card #", "Phone Number"])}