LigandNetwork node and edge sorting clash on same molecules with different properties

[jthorton]

Describe the bug

After #467 the edge and node sorting was changed to use the SMC inchikey which should be stable across versions of GUFE. However when we have multiple nodes in a network which are the same SMC but with different properties (charges, conformation, ...) we could get a non-consistent sorting of the edges and may need to add a secondary property to sort by. This issue is to remind us to come back to this if it becomes a problem.

To Reproduce
Steps to reproduce the behavior (ideally a minimally reproducible example):

Software versions

• Which operating system and version did you use? (e.g. ubuntu 22.04.5)
• Which method did you use to install this package? (e.g. conda-forge)
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Output

Expected behavior

Additional context