This release moves M3 to use the IBM Runtime `SamplerV2` for executing the calibration circuits. This will break usage on other HW platforms, e.g. IQM, but I am unsure how to better handle this at present, and will push that to v3.0. There is no major feature update here save for this, so (non-IBM) users can stick with v2.6.3 if desired.
**This will be the last release before a major rework resulting in M3 v3.0**
Other features:
- Users can specify the execution mode used to execute the calibration circuits, i.e. users can use the same `Batch` or `Session` to run the calibration circuits and other circuits. An example is added to the documentation.