feature request: bulk entity details, get triggers that invoke an action, and update timestamps

I figured I'd open the discussion here and then based on what would be deemed as ok-to-have features, we could open individual issues, saving time in case they're all duds.

## Bulk Details
Currently, whenever I'm trying to assess memory or timeout limits of multiple actions, I have to make a details request per action, which can be time consuming and repetitive. It would nice if I could make a single request for a list of actions and get the details back that I'm interested in seeing. Maybe I could pass a list of interested fields or something to that effect. It would be cool if this could apply to things like actions

## Get Triggers That Invoke an Action
Currently, when trying to find which triggers invoke an action, I'm requesting my list of rules, then I have to request the details for each of those rules to see its trigger an action. Then I can filter based on the action I'm investigating. This can be a time consuming and repetitive process. It would be nice if I could either ask explicitly for a list of triggers for a given action, or at least filter rules by a given action and get bulk details like the first feature request where I could specific interested fields.

## Last-updated Timestamp and Querying
I figured that it might be useful to include a last-updated timestamp with the entity as a way of possibly filtering or querying based on that timestamp. Like being able to say "give me only actions more recently update than X".