5 parser bug

[lpicci96]

• Improves dtype formatting. Previously numeric cols that were not OBS_VALUE were set to int16 which was not sufficient to store values such as SCALE: 1000000. This change first coerces non numeric values to nulls and then converts specific columns to int64
• Improves logging
• Improved error handling

Closes #5

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 86.66667% with 2 lines in your changes missing coverage. Please review.

Project coverage is 90.71%. Comparing base (27d3606) to head (4613b3b).

Files with missing lines	Patch %	Lines
src/imf_reader/weo/parser.py	75.00%	1 Missing ⚠️
src/imf_reader/weo/reader.py	90.90%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main       #6      +/-   ##
==========================================
- Coverage   91.01%   90.71%   -0.31%     
==========================================
  Files           6        6              
  Lines         178      183       +5     
==========================================
+ Hits          162      166       +4     
- Misses         16       17       +1     

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[jm-rivera]

Thanks @lpicci96 my only question would be about setting types vs doing something like on the importers package + pyarrow. That way we let that engine figure out the right data types, instead of hardcoding. What do you think?

[jm-rivera]

@lpicci96 we should incorporate into bblocks