fix: dataset slicing

[ab93]

• fix StreamingDataset slicing
• add method to return full windowed data
• fix to just return the copy of the original array

[codecov[bot]]

Codecov Report

Merging #222 (de20f49) into main (7778ae8) will increase coverage by 0.23%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #222      +/-   ##
==========================================
+ Coverage   96.93%   97.16%   +0.23%     
==========================================
  Files          45       45              
  Lines        1761     1764       +3     
  Branches      137      137              
==========================================
+ Hits         1707     1714       +7     
+ Misses         42       37       -5     
- Partials       12       13       +1     

Impacted Files	Coverage Δ
numalogic/tools/data.py	95.29% <100.00%> (+8.70%)	:arrow_up:

... and 1 file with indirect coverage changes

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