Possible: yes. Lisp image can hold arbitrary data, including source code, versions, etc. Specifically, arbitrary data can be attached to symbols. Make sense: n

Possible: yes. Lisp image can hold arbitrary data, including source code, versions, etc. Specifically, arbitrary data can be attached to symbols. Make sense: no, unless you have very special requirements. It would be very different from common practice. Images are still much more fragile than files outside, they are not designed to last across implementation releases. (Note: some implementations might hold full code of every function in memory, that's not unreasonable.)