Fix #629 confusing debug log by ConversationStore

[seratch]

Summary

This pull request resolves #629 by getting rid of confusing and irrelevant debug logs for most developers.

Requirements (place an x in each [ ])

• I've read and understood the Contributing Guidelines and have done my best effort to follow them.
• I've read and agree to the Code of Conduct.

[codecov]

Codecov Report

Merging #827 (3fdf04a) into main (257dd6d) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #827      +/-   ##
==========================================
+ Coverage   66.04%   66.06%   +0.02%     
==========================================
  Files          13       13              
  Lines        1172     1173       +1     
  Branches      342      343       +1     
==========================================
+ Hits          774      775       +1     
  Misses        333      333              
  Partials       65       65              

Impacted Files	Coverage Δ
src/conversation-store.ts	100.00% <100.00%> (ø)

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