fix: invalid display of tracing error

[pboros]

An invalid tracing error was displayed when tracing was turned off, but metrics was turned on.

2022-10-10T05:56:08Z ERR metrics/measurement.go:296 recordTimerDuration was called on a span that was not started ot stopped resource_name=/tigrisdata.v1.Tigris/CreateDatabase service_name=tigris-server

The measurement type is used both by tracing and metrics. So the logic needs to happen even if tracing is turned off.

Added some more debug messages for easier troubleshooting of future issues like this.

[codecov-commenter]

Codecov Report

Base: 31.48% // Head: 31.46% // Decreases project coverage by -0.01% ⚠️

Coverage data is based on head (b1866fc) compared to base (853434e).
Patch coverage: 16.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #581      +/-   ##
==========================================
- Coverage   31.48%   31.46%   -0.02%     
==========================================
  Files          96       96              
  Lines       11117    11135      +18     
==========================================
+ Hits         3500     3504       +4     
- Misses       7301     7314      +13     
- Partials      316      317       +1     

Impacted Files	Coverage Δ
server/metrics/measurement.go	42.85% <16.00%> (-1.59%)	⬇️

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[tigrisdata-argocd-bot]

🎉 This PR is included in version 1.0.0-beta.5 🎉

The release is available on GitHub release

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