Validate ranges with quantiles and buckets

[thedevbirb]

Both Summary and Buckets accept evaluations to &[f64] (or equivalent type for our purposes), but the code successfully compiles if I add incorrect values for quantiles like -1.0 or 2.0 or negative-valued buckets in histograms.

Ideally, we should emit a compiler error to the user.

[Karrq]

This is actuallly pretty tricky if we want to emit a compiler error, becuase the macro doesn't have the capability to evaluate the expression specified to arrive at the final value that we pass in the constructor.

We could do some heuristic tho, basically parsing the string for any invalid value in a best effort.
Meaning things like "0.3 - 0.4" wouldn't be caught but "-0.1" would (even in this case, we could just check for '-' in the string).

Alternatively we can make it a more explicit runtime error by creating type wrappers over the values we pass in to the constructors so it can be checked asap.