Major Description
Currently, Guacamole screen recording contains only graphical events and optionally admins can use recording-include-keys to include also key events into the recording (https://guacamole.apache.org/doc/gug/configuring-guacamole.html#graphical-session-recording ).
While that might be enough for certain situations, for various auditing/compliance reasons, clipboard paste events might be required. If user performs clipoard paste, these data are mostly not included (in certain cases those text information might be present in Typescript), so when determining what user actually pasted, is not possible.
I suggest implementing new connection parameter recording-include-clipboard which would hook into the user clipboard handler and optionally dump the relevant clipboard instruction and related stream events (https://guacamole.apache.org/doc/gug/protocol-reference.html#clipboard-instruction ) to include only the user-pasting clipboard contents.
If you're ok with implementing this improvement, I can draft a PR for all the relevant parts.
Obviously this should come with warning for administrators to understand the consequences of enabling the parameter - from both capacity perspective (recording might get larger depending on the amount of data pasted, although probably less data than actual screen capture) as well as legal / regulations perspective (data within clipboard can contain sensitive information and data not related to the actual Guacamole session).