FwHeadless followup: log verbose progress of S/R, stripping out passwords before logging

[rmunn]

Describe the feature
Once #1136 is merged, we'll want to take the verbose progress messages coming from LfMergeBridge and send them to the ILogger instance. However, since there are some parts of Chorus that still expose the password, we should strip the password out (we know the password we used, since it's in the config) of any log messages before proceeding. (Unless the password is "pass", in which case we won't strip it out).