api status checker

[cfaur09]

Proposed Changes

• Add Elastic (count) metrics
• Add Gateway current rounds metrics for every shard

How to test

• when statusChecker flag is active elastic metrics and gateway metrics should work

[codecov-commenter]

Codecov Report

:exclamation: No coverage uploaded for pull request base (development@9791553). Click here to learn what that means. Patch has no changes to coverable lines.

Additional details and impacted files

@@              Coverage Diff               @@
##             development     #848   +/-   ##
==============================================
  Coverage               ?   26.93%           
==============================================
  Files                  ?        7           
  Lines                  ?      245           
  Branches               ?        8           
==============================================
  Hits                   ?       66           
  Misses                 ?      171           
  Partials               ?        8           

Flag	Coverage Δ
unittests	26.93% <ø> (?)

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[tanghel]

todo:

• total identities :ballot_box_with_check:
• total nodes :ballot_box_with_check:
• total providers :ballot_box_with_check:
• total rounds :ballot_box_with_check:
• total shards :ballot_box_with_check:
• total mex pairs (and create /count endpoint) :ballot_box_with_check:
• total mex farms (and create /count endpoint) :ballot_box_with_check:
• total mex tokens (and create /count endpoint) :ballot_box_with_check:
• create one histogram for all economics values (economicsHistogram / setEconomicsValue(name, value)) :ballot_box_with_check:
• create one histogram for all maiar exchange values (mexEconomicsHistogram / setMexEconomicsValue(name, value)) :ballot_box_with_check: