fix b/w compat chitchat implementation

[vangheem]

Description

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How was this PR tested?

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[codecov]

Codecov Report

Patch coverage: 39.39% and project coverage change: -0.07 ⚠️

Comparison is base (c0e1f1f) 85.39% compared to head (c0d47d6) 85.32%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1109      +/-   ##
==========================================
- Coverage   85.39%   85.32%   -0.07%     
==========================================
  Files         404      404              
  Lines       22260    22293      +33     
==========================================
+ Hits        19008    19021      +13     
- Misses       3252     3272      +20     

Flag	Coverage Δ
ingest	74.35% <ø> (ø)
nucliadb	66.89% <39.39%> (-0.06%)	⬇️
reader	74.08% <ø> (ø)
sdk	43.17% <ø> (ø)
train	60.33% <ø> (ø)
utils	85.17% <ø> (ø)
writer	84.98% <ø> (ø)

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Impacted Files	Coverage Δ
...iadb/nucliadb/common/cluster/discovery/chitchat.py	70.58% <39.39%> (-29.42%)	⬇️

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