There is no documentation like you seek. The life of your part in storage is primarily a function of: * Quality of the part fabrication process. * Ingenuity and diligence you apply in protecting the parts from the environment.
You need to: * Handle and package the parts properly to protect them from degradation. * Store them in a benign environment. * Check the solderability periodically. * Refresh the solderability as required. * Demoisturize parts prior to soldering.