Maybe using "spotlight comments" for each session within a project might help out a lot; along with the "edit info text" feature within Ableton, and, perhaps, a text document for the entire project.
    The link I'm sharing has some very helpful production tips on how to organize a project folder, so that it is streamlined and efficient; yet nothing is lost. It gives a description of different types of sessions within a project; such as: the "Master" session, the "Mix" session, "Source" sessions and "Slave: Outgoing/Returning" sessions. I hope this helps:

    D. Sav 4 years ago