Allow logging of non-float values

[matthiasdiener]

Currently, add_quantities() is restricted to floats.

[inducer]

I'd find it useful to target this to a concrete use case. Which one do you have in mind?

[matthiasdiener]

My current use case is to log the output of pyinstrument, which can't be easily transformed into floats, but it would be helpful to store it as text.

[inducer]

I find that that might be using the wrong tool for the job. PyInstrument is used ad-hoc during development, not on an ongoing basis. So it doesn't really need structured data gathering. Plus the output from it is, for all intents and purposes, a big binary blob, where there are only disadvantages if you keep it in a SQL database. You can, but that doesn't mean you should.