Call log entries

Every time a call is handled by a turret (placed, received or missed), an entry is inserted in TSS database.

This entry is "updated" every time information about this call change:

·when its SIP Call-Id changes;

·when the call is terminated (its duration change).

Since we want to avoid any conflict during SQL database replication, this logging process will not use update queries, but insert entries with increased version number.