errorcodes.py now optionally accepts --ticket=12345 and --ticket=SERVER-12345 (case insensitive). When substituting a log statement such as:

LOGV2(0, "message", "variable"_attr=variable);

the error code of 0 is typically replaced with the highest error code used in the server plus one. If --ticket=<ticket num> is specified, errorcodes.py will instead replace the error code from the range 1234500 -> 1234599. By convention, this should ensure that the error code will never collide when rebasing locally or pushing to the commit queue.

Original Description
With structured logging, a new protocol was established for choosing assert/log ids that don't collide, <serverTicketNumber>00-99.

If errorcodes.py accepted the server ticket as input, it could use that as its start point for filling in message IDs.