Instrument Server Fixes

[tieneupin]

• Added logic to instrument server's 'upload_gain_reference()' function to look for 'rsync_path' key from MachineConfig before settling on using Murfey's URL.
• Added logs to describe parameters passed to functions for more effective debuging.

[codecov]

Codecov Report

Attention: Patch coverage is 21.42857% with 11 lines in your changes missing coverage. Please review.

Project coverage is 28.78%. Comparing base (9ea4921) to head (123840f).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #560      +/-   ##
==========================================
- Coverage   28.80%   28.78%   -0.02%     
==========================================
  Files          80       80              
  Lines       10596    10605       +9     
  Branches     1413     1414       +1     
==========================================
+ Hits         3052     3053       +1     
- Misses       7442     7450       +8     
  Partials      102      102              

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