Add Creation Date column to Nodes, Interfaces, Volumes tables

There are many times we would like to know the date a node or interface was added to NPM.  It's great node/interface changes are being logged in Events but this is not helpful for permanent historical purposes.  I'd like to request a new column be added to the Nodes table labeled "Node Added" (or Node Created) so this information is retained until the Node is retired/deleted.  Also, would like to have this info displayed in the Advanced Node Details resource.  In addition, a similar column be added for Interfaces and Volumes tables.