fix: Sort transcript data output

[jarbesfeld]

closes #451

[korikuzma]

Add test case + update docstrings with sorted results comment if not already included (quick look)

[jarbesfeld]

@korikuzma We don't need to add a test case for this (I think), since this was a fix in the function call that was used in mane_transcript.py. I included a docstring to explain the sorting rationale.

[korikuzma]

@korikuzma We don't need to add a test case for this (I think), since this was a fix in the function call that was used in mane_transcript.py. I included a docstring to explain the sorting rationale.

I do think we should have a test case since the bug was caused by this method using unsorted results. This would help prevent this issue from happening again in the future

[jarbesfeld]

@korikuzma The added test is for this example you had identified. When I run the function that is called by VarCat, I get the following output:

ProteinAndCdnaRepresentation(protein=DataRepresentation(gene='CDKN2A', refseq='NP_000068.1', ensembl='ENSP00000307101.5', pos=(57, 58), strand=<Strand.NEGATIVE: -1>, status=<TranscriptPriority.MANE_SELECT: 'mane_select'>), cdna=CdnaRepresentation(gene='CDKN2A', refseq='NM_000077.5', ensembl='ENST00000304494.10', pos=(171, 172), strand=<Strand.NEGATIVE: -1>, status=<TranscriptPriority.MANE_SELECT: 'mane_select'>, coding_start_site=30, coding_end_site=501, alt_ac='NC_000009.12'))