Add resolvers to get details of specific runs

[tpoliaw]

On the instrumentSession object, run takes a scan number as these should
be unique within a session. On the root, it takes a run id as these
should be unique across tiled.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 45 lines in your changes missing coverage. Please review.
✅ Project coverage is 46.68%. Comparing base (f346d54) to head (62834d7).

Files with missing lines	Patch %	Lines
src/model.rs	0.00%	37 Missing ⚠️
src/clients.rs	0.00%	8 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #89      +/-   ##
==========================================
- Coverage   50.55%   46.68%   -3.87%     
==========================================
  Files          12       12              
  Lines         544      589      +45     
==========================================
  Hits          275      275              
- Misses        269      314      +45     

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