As part of a migration effort from another bug tracking service, we have a single project that currently has around 25,000 issues in it. We would like to start bulk moving some of these issues into other projects. To find the issues we want to move, we will have to do a search on a custom field of type text field. Is this going to be a problem? Is there a limit to how many issues we can have in a single project? What kind of performance can we expect searching and performing bulk operations over 25k issues?