Add a compiler option to modify operations

[dlindhol]

This seems like a simple yet powerful way to construct an AdaptedDataset with a function to munge operations to best fit the needs of the Adapter. For example, I often want to enforce that a particular operation is applied (e.g. telemetry conversions), but that would show up as the first operation preventing pushing down user operations (like time selections) to the Adapter. This allows me to have special logic about doing time selections before this specific operation.

This seemed like a handy alternative to a generic query optimizer, for now.

[dlindhol]

I might not need this as soon as I thought. I'm wanting to make an AdaptedDataset from fdml then add operations so that the time selection are applied first (which that adapter can push down). I figured I would just make a copy of the AdaptedDataset with the compiler, but there is no mechanism to make that copy. (Though I thought that I exposed the AdaptedDataset's Adapter somewhere?)

[dlindhol]

I am using this experimentally for I-ALiRT so I can add operations to manipulate the dataset yet still be able to push down time selections to the wrapped dataset's adapter that builds the service query.