This implements an index for the data in the table buffers. For now, by default, it indexes all tags, keeping a mapping of tag key/value pair to the row ids that it has in the buffer. When queries ask for record batches from the table buffer, the filter expression is evaluated to determine if a record batch can be built on the fly using only the row ids that match the index. If we don't have it in the index, the entire record batch from the buffer will be returned.

This also updates the logic in segment state to only request a record batch with the projection. The query executor was updated so that it pushes the filter and projection down to the request to get table chunks.

While implementing this, I believe I uncovered a bug where when limits are hit, a write still attempts to get buffered. I'll log a follow up to look at that.