Extension:CentralNotice/cn template log table

Schema summary
mysql> describe cn_template_log; +---+--+--+-+--++ +---+--+--+-+--++ +---+--+--+-+--++
 * Field                        | Type                                 | Null | Key | Default  | Extra          |
 * tmplog_id                    | int(10) unsigned                     | NO   | PRI | NULL     | auto_increment |
 * tmplog_timestamp             | binary(14)                           | NO   | MUL | NULL     |                |
 * tmplog_user_id               | int(10) unsigned                     | NO   | MUL | NULL     |                |
 * tmplog_action                | enum('created','modified','removed') | NO   |     | modified |                |
 * tmplog_template_id           | int(10) unsigned                     | NO   | MUL | NULL     |                |
 * tmplog_template_name         | varbinary(255)                       | YES  |     | NULL     |                |
 * tmplog_begin_anon            | tinyint(1)                           | YES  |     | NULL     |                |
 * tmplog_end_anon              | tinyint(1)                           | YES  |     | NULL     |                |
 * tmplog_begin_account         | tinyint(1)                           | YES  |     | NULL     |                |
 * tmplog_end_account           | tinyint(1)                           | YES  |     | NULL     |                |
 * tmplog_begin_fundraising     | tinyint(1)                           | YES  |     | NULL     |                |
 * tmplog_end_fundraising       | tinyint(1)                           | YES  |     | NULL     |                |
 * tmplog_begin_autolink        | tinyint(1)                           | YES  |     | NULL     |                |
 * tmplog_end_autolink          | tinyint(1)                           | YES  |     | NULL     |                |
 * tmplog_begin_landingpages    | varbinary(255)                       | YES  |     | NULL     |                |
 * tmplog_end_landingpages      | varbinary(255)                       | YES  |     | NULL     |                |
 * tmplog_content_change        | tinyint(1)                           | YES  |     | 0        |                |
 * tmplog_begin_prioritylangs   | blob                                 | YES  |     | NULL     |                |
 * tmplog_end_prioritylangs     | blob                                 | YES  |     | NULL     |                |
 * tmplog_begin_archived        | tinyint(1)                           | YES  |     | NULL     |                |
 * tmplog_end_archived          | tinyint(1)                           | YES  |     | NULL     |                |
 * tmplog_begin_category        | varbinary(255)                       | YES  |     | NULL     |                |
 * tmplog_end_category          | varbinary(255)                       | YES  |     | NULL     |                |
 * tmplog_begin_preview_sandbox | tinyint(1)                           | YES  |     | NULL     |                |
 * tmplog_end_preview_sandbox   | tinyint(1)                           | YES  |     | NULL     |                |
 * tmplog_begin_controller_mixin | varbinary(4096)                     | YES  |     | NULL     |                |
 * tmplog_end_controller_mixin  | varbinary(4096)                      | YES  |     | NULL     |                |
 * tmplog_begin_devices         | varbinary(512)                       | YES  |     | NULL     |                |
 * tmplog_end_devices           | varbinary(512)                       | YES  |     | NULL     |                |
 * tmplog_comment               | varbinary(255)                       | YES  |     | NULL     |                |