Fix variable scenario filtering, and availability TS multiplier

[ktehranchi]

Fixes:

• Fixes scenario filtering of variables by Band ID. We could potentially apply this filter to other Enum classes, but I didn't want to unnecessarily filter out data unless we knew that behavior was needed:
  

  R2X/src/r2x/parser/plexos.py

  Lines 1249 to 1258 in ebac92c

  	# Filtering Variables to select only the correct band-id which should be used
  	# when accessing Variable data. We may also need to apply this filtering to
  	# other Enum classes.
  	variables = data.filter(pl.col("child_class_name") == ClassEnum.Variable.name)
  	variables = variables.group_by("object_id", maintain_order=True).map_groups(
  	lambda groupdf: groupdf.filter(pl.col("band") == pl.col("band").min())
  	)
  	data = data.filter(pl.col("child_class_name") != ClassEnum.Variable.name)
  	data = pl.concat([data, variables])

• One of the paths for parsing TS data was missing a * record['available']

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 42.85714% with 4 lines in your changes missing coverage. Please review.

Project coverage is 73.94%. Comparing base (3caade5) to head (ceb5bcf).

Files with missing lines	Patch %	Lines
src/r2x/parser/plexos.py	42.85%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #91      +/-   ##
==========================================
- Coverage   73.98%   73.94%   -0.05%     
==========================================
  Files          37       37              
  Lines        3729     3734       +5     
==========================================
+ Hits         2759     2761       +2     
- Misses        970      973       +3     

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[JensZack]

This looks good to me, but we should probably add a test to cover this case. Do we have a dataset we can run that hits these changes?

[ktehranchi]

So we don't have a database that covers this test case. I don't have access to plexos to make one. One idea would be to use a more complicated public file like the caiso's deterministic plexos file as a test case. But r2x fails to convert this atm.