CMFActivitiy: Use BIGINT for uid as slapos master has huge amount of activities

product/CMFActivity/skins/activity/SQLBase_createMessageTable.zsql

@@ -9,7 +9,7 @@ class_file:
 </dtml-comment>
 <params>table</params>
 CREATE TABLE <dtml-var table> (
-  `uid` INT UNSIGNED NOT NULL,
+  `uid` BIGINT UNSIGNED NOT NULL,
   `date` DATETIME NOT NULL,
   `path` VARCHAR(255) NOT NULL,
   `active_process_uid` INT UNSIGNED NULL,