add health watchdog

[Besroy]

Related PRs:
SM: https://github.corp.ebay.com/SDS/storage_mgr/pull/263
HS: eBay/HomeStore#925

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 66.66667% with 18 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (stable/v13.x@4c574b7). Learn more about missing BASE report.
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Additional details and impacted files

@@               Coverage Diff               @@
##             stable/v13.x     #338   +/-   ##
===============================================
  Coverage                ?   50.85%           
===============================================
  Files                   ?       65           
  Lines                   ?     4202           
  Branches                ?     1819           
===============================================
  Hits                    ?     2137           
  Misses                  ?      871           
  Partials                ?     1194           

Components	Coverage Δ
AuthManager	55.55% <0.00%> (?)
Cache	31.52% <0.00%> (?)
FDS	60.92% <0.00%> (?)
FileWatcher	37.60% <0.00%> (?)
Flip	∅ <0.00%> (?)
gRPC	56.25% <0.00%> (?)
Logging	27.65% <0.00%> (?)
Metrics	58.56% <0.00%> (?)
Options	25.00% <0.00%> (?)
Setting	29.62% <0.00%> (?)
StatusObject	37.50% <0.00%> (?)
Utility	61.43% <0.00%> (?)
Version	36.00% <0.00%> (?)

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