Adding overlap support

[JoOkuma]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 89.53488% with 9 lines in your changes missing coverage. Please review.

Project coverage is 87.93%. Comparing base (40df7d7) to head (14c1942).

Files with missing lines	Patch %	Lines
src/tracksdata/graph/_sql_graph.py	83.33%	4 Missing and 2 partials ⚠️
src/tracksdata/graph/_base_graph.py	77.77%	2 Missing ⚠️
src/tracksdata/graph/_graph_view.py	90.90%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #75      +/-   ##
==========================================
+ Coverage   87.84%   87.93%   +0.08%     
==========================================
  Files          39       39              
  Lines        1884     1956      +72     
  Branches      329      338       +9     
==========================================
+ Hits         1655     1720      +65     
- Misses        146      151       +5     
- Partials       83       85       +2     

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