fix: update snapshot after conflict check

[ion-elgreco]

Description

Currently with multiple retries we would conflict check the same versions because our starting point (read_snapshot) is never updated after conflict resolution, this could be costly with many concurrent writers.

[codecov]

Codecov Report

Attention: Patch coverage is 87.50000% with 1 line in your changes missing coverage. Please review.

Project coverage is 72.09%. Comparing base (b3efdfc) to head (0cec998).

Files with missing lines	Patch %	Lines
crates/core/src/operations/transaction/mod.rs	87.50%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3205      +/-   ##
==========================================
- Coverage   72.10%   72.09%   -0.02%     
==========================================
  Files         138      138              
  Lines       45320    45323       +3     
  Branches    45320    45323       +3     
==========================================
- Hits        32678    32675       -3     
- Misses      10567    10568       +1     
- Partials     2075     2080       +5     

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