Allow SDK to report requested downloaded objects and minor adjustments

[adamhathcock]

Allows for

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 69.05%. Comparing base (deddb21) to head (84c6245).
Report is 1 commits behind head on dev.

Files with missing lines	Patch %	Lines
...eckle.Sdk/Serialisation/V2/Receive/ObjectLoader.cs	0.00%	3 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##              dev     #203       +/-   ##
===========================================
+ Coverage   57.29%   69.05%   +11.76%     
===========================================
  Files         243      259       +16     
  Lines       10020    10739      +719     
  Branches     1090     1091        +1     
===========================================
+ Hits         5741     7416     +1675     
+ Misses       4022     2974     -1048     
- Partials      257      349       +92     

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