Task History Compression

Task history is compressed in the following ways:

For non-subscribers:

- History is represented by 1 value for each day for the previous 60 days - After that, task history is compressed to 1 value each month for the previous 10 months, and then 1 value each year for the previous years.

As an example, on January 1st, 2016, a non-subscriber would have uncompressed task history going back to November 2nd, 2015. After that, they'd have ten entries, one each for the months of January 2015-October 2015, and then 1 entry each for the entire years of 2014 and 2013, respectively.

For subscribers:

- History is represented by 1 value for each day for the previous 365 days - After that, task history is compressed to 1 value each month for the previous 12 months, and then 1 value each year for the previous years.

As an example, on January 1st, 2016, a subscriber would have uncompressed task history going back to January 1st, 2015. After that, they'd have twelve entries, one each for the months of January 2014-December 2014, and then 1 entry each for the entire year of 2013.