catalyst-node: crash on serf failures

[iameli]

This avoids the 500 error we've been seeing a lot.

[codecov]

Codecov Report

Merging #262 (76cd4a0) into main (d2dfb43) will decrease coverage by 0.43795%.
The diff coverage is 2.94118%.

@@                 Coverage Diff                 @@
##                main        #262         +/-   ##
===================================================
- Coverage   34.23326%   33.79531%   -0.43795%     
===================================================
  Files              4           4                 
  Lines            926         938         +12     
===================================================
  Hits             317         317                 
- Misses           567         579         +12     
  Partials          42          42                 

Impacted Files	Coverage Δ
cmd/catalyst-node/catalyst-node.go	19.07131% <2.94118%> (-0.38723%)	⬇️

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Impacted Files	Coverage Δ
cmd/catalyst-node/catalyst-node.go	19.07131% <2.94118%> (-0.38723%)	⬇️