Improve errors for debugging purposes

A common issue we run into is that pushes to Salesforce fail after cloning a database to a dev site, where the site is connected to a different SF instance. This makes all the mapping objects invalid, but the IDs still get included in push attempts. This patch suggests that this could be the issue when certain errors are thrown, and also improves the logging messages.

This could be extended around the module, but the key here is isolating those ID mismatch errors and making them obvious.