Locations
The best places to look for such changes are the release notes under the “Backward incompatible changes” section.
https://docs.mayan-edms.com/releases/4.5.html#backward-incompatible-changes
The other place is the Knowledge Base articles sharing work in progress for upcoming versions.
And the follow up articles after a version is release explaining changes and showcasing the new features.
Version 4.8 new features
Configuring File Metadata Drivers
Using Ollama Integration to Automatically Classify Driver Licenses by US State
Upgrade method
For multi version upgrades we recommend doing them in steps by the latest bug fix release of each minor version. Then read each release notes for the next version to know what to expected, do adjustments to the configuration and then proceed to the next minor version. This way disruptions are kept to a minimum.
Databases and for the most part settings are automatically migrated. Only user entered content is not migrate because of the difficulty parsing it. Attempting to automatically migrate user content might end up causing more problems.
Further changes
Besides making workflow document access work under the variable workflow_instance there are not other changes in that regard.
The only change related to workflows is the addition of a new variable to make things easier. This was an undocumented variable, later removed, now re-added as an official feature.
entry_log variable references here:
https://docs.mayan-edms.com/releases/4.8.html#workflows
and here: