Optionally propagate source file root to Detector's scan request

[grvillic]

Context

Custom detectors that inherit from IDetector can optionally access the SourceFileRoot property in the ScanRequest class.

This is useful if a custom detector wants to use placeholders of the reported file paths under certain conditions rather than just the source directory being scanned by the detector.

[codecov]

Codecov Report

Attention: Patch coverage is 96.96970% with 1 line in your changes missing coverage. Please review.

Project coverage is 89.6%. Comparing base (bdfdcd2) to head (73d5939).

Files with missing lines	Patch %	Lines
...r.Tests/Services/DetectorProcessingServiceTests.cs	96.1%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #1353   +/-   ##
=====================================
  Coverage   89.6%   89.6%           
=====================================
  Files        384     384           
  Lines      29963   29990   +27     
  Branches    1835    1840    +5     
=====================================
+ Hits       26874   26900   +26     
  Misses      2698    2698           
- Partials     391     392    +1     

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[github-actions]

👋 Hi! It looks like you modified some files in the Detectors folder.
You may need to bump the detector versions if any of the following scenarios apply:

• The detector detects more or fewer components than before
• The detector generates different parent/child graph relationships than before
• The detector generates different devDependencies values than before

If none of the above scenarios apply, feel free to ignore this comment 🙂