HTML Report: Daylight information about Phase (Execution, Compilation, Instantiation)

https://github.com/bytecodealliance/sightglass/pull/295#issuecomment-3666747004

> Oh also, looking at the screenshot, it is not clear to me which phase we are looking at data for: compilation, instantiation, or execution. That should probably be made clear.

Right now, just Execution time data is provided. It would be nice to be able to show all Phases. At a minimum, the report should explicitly state that the data is around the Compilation Phase specifically.