Hint data attributes on fp adapter

[shihab-dls]

This adds type hints for the following attributes into FrameProcessorAdapterController:

    data_compression: AttrRW[str]
    data_datatype: AttrRW[str]
    data_dims_0: AttrR[int]  # y
    data_dims_1: AttrR[int]  # x

This is defined in EigerFrameProcessorAdapterController on fastcs_eiger, but fastcs-jungfrau needs these attributes too, so we should redefine it here.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.40%. Comparing base (93b56df) to head (80d80cc).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #108      +/-   ##
==========================================
+ Coverage   96.38%   96.40%   +0.02%     
==========================================
  Files          16       16              
  Lines         636      640       +4     
==========================================
+ Hits          613      617       +4     
  Misses         23       23              

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