Fix a validator ordering issue with PVSS & DKG instances

[piotr-roslaniec]

• Browse the commits one by one to follow the developments of this story
• Replaces implicit ordering with explicit ordering and validity checks
• Changes how the ordering of shares and validators is tracked within DKG

[codecov-commenter]

Codecov Report

Merging #95 (f6cf412) into main (da5e55e) will decrease coverage by 1.13%.
The diff coverage is 84.75%.

@@            Coverage Diff             @@
##             main      #95      +/-   ##
==========================================
- Coverage   81.78%   80.65%   -1.13%     
==========================================
  Files          25       23       -2     
  Lines        3975     4157     +182     
==========================================
+ Hits         3251     3353     +102     
- Misses        724      804      +80     

Impacted Files	Coverage Δ
ferveo-python/src/lib.rs	0.29% <0.00%> (-0.03%)	⬇️
tpke-wasm/src/lib.rs	72.81% <0.00%> (ø)
tpke/src/api.rs	0.00% <0.00%> (ø)
ferveo-common/src/lib.rs	44.82% <42.85%> (+22.60%)	⬆️
ferveo-common/src/keypair.rs	71.05% <65.74%> (-13.40%)	⬇️
ferveo/src/api.rs	84.77% <69.56%> (+1.93%)	⬆️
ferveo-common/src/utils.rs	94.73% <93.75%> (-5.27%)	⬇️
ferveo/src/pvss.rs	90.13% <95.71%> (ø)
ferveo/src/dkg.rs	95.68% <96.11%> (+95.68%)	⬆️
ferveo/src/lib.rs	100.00% <100.00%> (ø)
... and 3 more

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