Renaming "track_id" to "tracklet_id"

[yfukai]

This may be a bit opinionated, but it might make sense to rename all track_id to tracklet_id for consistent terminology. (We already have tracklet_nodes and tracklet_graph).

[codecov-commenter]

Codecov Report

❌ Patch coverage is 87.95181% with 10 lines in your changes missing coverage. Please review.
✅ Project coverage is 88.03%. Comparing base (ea2026c) to head (eee1798).

Files with missing lines	Patch %	Lines
src/tracksdata/metrics/_ctc_metrics.py	50.00%	2 Missing and 2 partials ⚠️
src/tracksdata/graph/_rustworkx_graph.py	78.57%	1 Missing and 2 partials ⚠️
src/tracksdata/io/_numpy_array.py	90.47%	1 Missing and 1 partial ⚠️
src/tracksdata/graph/_base_graph.py	85.71%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #179   +/-   ##
=======================================
  Coverage   88.03%   88.03%           
=======================================
  Files          50       50           
  Lines        3444     3444           
  Branches      596      596           
=======================================
  Hits         3032     3032           
  Misses        248      248           
  Partials      164      164           

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[JoOkuma]

Hi @yfukai, I completely agree, thanks for the PR.
Can I merge it?

[yfukai]

Thanks @JoOkuma , sure!