feat(guardian-prover-health-check): add indexer in MySQL (#15945)

[xiaodino]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

❗ No coverage uploaded for pull request base (alpha-6@809d461). Click here to learn what that means.

Additional details and impacted files

@@            Coverage Diff             @@
##             alpha-6   #16058   +/-   ##
==========================================
  Coverage           ?   27.36%           
==========================================
  Files              ?       99           
  Lines              ?     5795           
  Branches           ?        0           
==========================================
  Hits               ?     1586           
  Misses             ?     4041           
  Partials           ?      168           

Flag	Coverage Δ		*Carryforward flag
eventindexer	17.28% <ø> (?)		Carriedforward from 739a268
guardian-prover-health-check	36.13% <ø> (?)
relayer	40.58% <ø> (?)		Carriedforward from 739a268

*This pull request uses carry forward flags. Click here to find out more.

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