fix: fullnode could stall and run out of memory

[jansegre]

Motivation

Missing skip_neighbors could lead to iterating over the whole blockchain.

Acceptance Criteria

• Add missing call to skip_neighbors in some places

Checklist

• If you are requesting a merge into master, confirm this code is production-ready and can be included in future releases as soon as it gets merged

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.01%. Comparing base (ae485dd) to head (dce22bf).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1462      +/-   ##
==========================================
- Coverage   86.02%   86.01%   -0.02%     
==========================================
  Files         435      435              
  Lines       33918    33919       +1     
  Branches     5297     5297              
==========================================
- Hits        29179    29176       -3     
- Misses       3693     3697       +4     
  Partials     1046     1046              

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