Optimize Gorilla for Microseconds or replace it

[skejserjensen]

#185 changed all timestamps from Milliseconds to Microseconds as it is the only time unit supported by delta-rs due to the current definition of the Delta Transaction Protocol. Thus, the implementation of Gorilla used for compressing timestamps should be optimized for Microseconds or replaced with a compression method that works better for Microseconds timestamps.

[skejserjensen]

Closed by the implementation of MacaqueTS in #341. While timestamp compression can be improved further, we found that the timestamps uses very little space compared to the values. Thus, compression of values should be optimized before compression of timestamps. For further information, see Section VIII Subsection G. MacaqueTS’s Storage Use in the paper Abduvoris Abduvakhobov, Søren Kejser Jensen, Christian Thomsen, Torben Bach Pedersen. Compressing High-Frequency Time Series Through Multiple Models and Stealing from Residuals. ICDE 2026.