feat(python): Allow DeltaTable input to scan_delta and read_delta

[deanm0000]

#19074

[codecov]

Codecov Report

Attention: Patch coverage is 77.77778% with 2 lines in your changes missing coverage. Please review.

Project coverage is 80.01%. Comparing base (900dc3b) to head (05da8d3).

Files with missing lines	Patch %	Lines
py-polars/polars/io/delta.py	77.77%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #19229      +/-   ##
==========================================
+ Coverage   79.99%   80.01%   +0.02%     
==========================================
  Files        1527     1527              
  Lines      209203   209208       +5     
  Branches     2415     2417       +2     
==========================================
+ Hits       167352   167400      +48     
+ Misses      41303    41259      -44     
- Partials      548      549       +1     

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[alexander-beedie]

A few minor suggestions (typing, error message), but otherwise I think allowing DeltaTable input here makes plenty of sense 👍

[deanm0000]

@alexander-beedie I accepted the tweaks but the code coverage doesn't like it. I'm not sure why, maybe it just needs a retry.

[alexander-beedie]

@alexander-beedie I accepted the tweaks but the code coverage doesn't like it. I'm not sure why, maybe it just needs a retry.

Yup, those failures are unrelated.