Extending the context instead of fixing the API breaks type safety.
For tracking the number of points / values written, it is much clearer
to pass an explicit tracker.
This commit ensures that the series file should work appropriately on
32-bit architecturs. It does this by reducing the maximum size of a
series file to 512MB on 32-bit systems, which should be fully
addressable.
It further updates tests so that the series file size can be reduced
further when running many tests in parallel on 32-bit architectures.
Dane Strandboge
Sam Arnold
Edd Robinson
Ben Johnson
Stuart Carnie