feat: enable using ENSEMBL chrMT transcript (#381)

[holtgrewe]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 90.69767% with 8 lines in your changes are missing coverage. Please review.

Project coverage is 76.11%. Comparing base (90bf387) to head (7beadeb).

Files	Patch %	Lines
src/db/create/mod.rs	91.25%	7 Missing ⚠️
src/annotate/seqvars/provider.rs	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #393      +/-   ##
==========================================
+ Coverage   75.78%   76.11%   +0.33%     
==========================================
  Files          24       24              
  Lines        5030     5092      +62     
==========================================
+ Hits         3812     3876      +64     
+ Misses       1218     1216       -2     

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