Number of samples burned in image and metadata

It would be great if we could add the number of samples used in the render.

And perhaps, also add the renderer like either Cycles/Eevee/Octane, GPU or CPU, the Light bounces, Color Management, HDRI used, etc (what other would you recommend?)

It's very handy to automatically burn this data onto the image because I can use these as a reference when comparing renders. Especially useful when you look at older rendered images that you forgot what setting were used.

What are your thoughts?