Add operation time and completion message to log messages

[gkinsman]

We keep track of operation durations via LogOperation , but we don't add the duration to the log message currently.

This PR adds the duration and completion message so the log is now: Starting bus finished in 603ms instead of Starting bus

[codecov]

Codecov Report

Merging #1026 (2082372) into main (76f1550) will increase coverage by 0.09%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##             main    #1026      +/-   ##
==========================================
+ Coverage   84.83%   84.92%   +0.09%     
==========================================
  Files         135      135              
  Lines        3290     3291       +1     
==========================================
+ Hits         2791     2795       +4     
+ Misses        499      496       -3     

Flag	Coverage Δ
linux	84.68% <50.00%> (+0.12%)	⬆️
macos	51.77% <50.00%> (+0.04%)	⬆️
windows	51.74% <50.00%> (+0.01%)	⬆️

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Impacted Files	Coverage Δ
...rc/JustSaying/Messaging/Monitoring/LogOperation.cs	62.50% <50.00%> (+1.63%)	⬆️
...ng/Middleware/ExactlyOnce/ExactlyOnceMiddleware.cs	77.77% <0.00%> (-14.82%)	⬇️
...ools/MessageHandling/Dispatch/MessageDispatcher.cs	98.18% <0.00%> (+12.72%)	⬆️

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