Returning previous and updated tracklet IDs from assign_tracklet_ids.

[yfukai]

In order to undo the action of assigning tracklet IDs, it would be useful to have a list of the updated IDs. This PR intends to have the function assign_tracklet_ids return the updated IDs. Since computing the updates has a computational cost, I made it optional, but input is welcome!

[codecov-commenter]

Codecov Report

❌ Patch coverage is 94.73684% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 88.04%. Comparing base (06d104e) to head (334d944).

Files with missing lines	Patch %	Lines
src/tracksdata/graph/_rustworkx_graph.py	94.73%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #180   +/-   ##
=======================================
  Coverage   88.03%   88.04%           
=======================================
  Files          50       50           
  Lines        3444     3454   +10     
  Branches      596      600    +4     
=======================================
+ Hits         3032     3041    +9     
  Misses        248      248           
- Partials      164      165    +1     

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[JoOkuma]

Hey @yfukai, great PR.
I left some minor comments.

[JoOkuma]

Would this work?

Suggested change

	tracklet_ids = [int(tid) for tid in tracklet_ids] # type: ignore
	tracklet_ids = tracklet_ids.tolist() # type: ignore

[yfukai]

Thanks for the suggestion! I changed this to tolist, and also moved it before the if blocks as I was missing the case with if previous_id_df is None. (Adds a slight overhead, but I believe it makes the code simpler).

[JoOkuma]

LGTM! thanks @yfukai
I need to investigate how to address the numpy scalar issue with SQLAlchemy. I think it allows a preprocessor, and the item() would be called there and invisible to the user.