Minor logging fixes for service bots

[slundqui]

• Different log levels on negative interest if pool is paused.
• Fixing a bug with encoded event lookup on event trigger.
• Cleaning up checkpoint bot rollbar logging

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.

Project coverage is 82.06%. Comparing base (7ea7bc7) to head (7021b74).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...c/agent0/hyperfuzz/system_fuzz/invariant_checks.py	0.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1687      +/-   ##
==========================================
+ Coverage   81.99%   82.06%   +0.07%     
==========================================
  Files          99       99              
  Lines        7602     7605       +3     
==========================================
+ Hits         6233     6241       +8     
+ Misses       1369     1364       -5     

Flag	Coverage Δ
unittests	82.06% <0.00%> (+0.07%)	⬆️

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