Add latency tracking to orchestrator info discovery

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Checklist:

• Read the contribution guide
• make runs successfully
• All tests in ./test.sh pass
• README and other documentation updated
• Pending changelog updated

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 32.90465%. Comparing base (9e68815) to head (b5719f4).

Additional details and impacted files

@@                 Coverage Diff                 @@
##              master       #3921         +/-   ##
===================================================
+ Coverage   32.87450%   32.90465%   +0.03015%     
===================================================
  Files            171         171                 
  Lines          42063       42067          +4     
===================================================
+ Hits           13828       13842         +14     
+ Misses         27194       27180         -14     
- Partials        1041        1045          +4     

Files with missing lines	Coverage Δ
common/types.go	0.00000% <ø> (ø)
discovery/db_discovery.go	69.20904% <100.00000%> (+1.20904%)	⬆️

... and 5 files with indirect coverage changes

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Files with missing lines	Coverage Δ
common/types.go	0.00000% <ø> (ø)
discovery/db_discovery.go	69.20904% <100.00000%> (+1.20904%)	⬆️

... and 5 files with indirect coverage changes

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