chore: update SynchronizerService to remove unwrap

[Freyskeyd]

Description

During deployment we detected that some peer were not accessible leading to some method call failure on gRPC. This PR is fixing the panic.

PR Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added or updated tests that comprehensively prove my change is effective or that my feature works

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (28a553b) 62.88% compared to head (f8d95f8) 62.63%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #403      +/-   ##
==========================================
- Coverage   62.88%   62.63%   -0.26%     
==========================================
  Files         220      220              
  Lines       11802    11801       -1     
==========================================
- Hits         7422     7391      -31     
- Misses       4380     4410      +30     

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