Added validation guardrail for AlchemicalNetworks with self-Transformations

[dotsdl]

Closes #188.

[codecov-commenter]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (b5a4e58) 82.73% compared to head (0c73cd8) 82.26%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #189      +/-   ##
==========================================
- Coverage   82.73%   82.26%   -0.48%     
==========================================
  Files          21       22       +1     
  Lines        2723     2735      +12     
==========================================
- Hits         2253     2250       -3     
- Misses        470      485      +15     

Files	Coverage Δ
alchemiscale/interface/client.py	92.01% <100.00%> (+0.05%)	⬆️
alchemiscale/storage/statestore.py	93.99% <100.00%> (+0.01%)	⬆️
alchemiscale/validators.py	100.00% <100.00%> (ø)
alchemiscale/interface/api.py	41.28% <50.00%> (-0.09%)	⬇️

... and 1 file with indirect coverage changes

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