Report pebble metrics

[ischasny]

• Update to the latest version of go-indexer-core that supports metrics reporting
• Will switch to the release version before merging this PR

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.07 🎉

Comparison is base (10c2059) 54.89% compared to head (e28dc4c) 54.97%.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1431      +/-   ##
==========================================
+ Coverage   54.89%   54.97%   +0.07%     
==========================================
  Files         150      150              
  Lines       15324    15324              
==========================================
+ Hits         8412     8424      +12     
+ Misses       6054     6044      -10     
+ Partials      858      856       -2     

Impacted Files	Coverage Δ
server/admin/http/server.go	91.42% <100.00%> (ø)

... and 1 file with indirect coverage changes

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