Add image scope scanning option to the Linux detector

[jasonpaulos]

Add the ability to configure the image scanning scope used by Syft for the Linux detector.

This allows your to pass in the argument --DetectorArgs Linux.ImageScanScope=squashed to have the detector invoke Syft with --scope squashed instead of the default of --scope all-layers.

If components from all layers are not needed, squashed has significant performance benefits.

[codecov]

Codecov Report

❌ Patch coverage is 98.23009% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.1%. Comparing base (601ebcd) to head (36db1f8).

Files with missing lines	Patch %	Lines
...ion.Detectors.Tests/LinuxContainerDetectorTests.cs	93.5%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@          Coverage Diff           @@
##            main   #1600    +/-   ##
======================================
  Coverage   90.0%   90.1%            
======================================
  Files        437     437            
  Lines      37181   37285   +104     
  Branches    2306    2312     +6     
======================================
+ Hits       33499   33606   +107     
+ Misses      3210    3206     -4     
- Partials     472     473     +1     

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[Copilot]

Pull request overview

This PR adds configurable image scanning scope to the Linux detector, allowing users to choose between scanning all layers (default) or only the squashed image for improved performance when intermediate layer components are not needed.

• Introduces a LinuxScannerScope enum with AllLayers and Squashed options
• Adds Linux.ImageScanScope detector argument to configure Syft's --scope parameter
• Updates all affected interfaces, implementations, and tests to support the new parameter

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/Microsoft.ComponentDetection.Detectors/linux/LinuxScannerScope.cs	New enum defining the two scan scope options (AllLayers and Squashed)
src/Microsoft.ComponentDetection.Detectors/linux/ILinuxScanner.cs	Updated interface to add scope parameter to ScanLinuxAsync method
src/Microsoft.ComponentDetection.Detectors/linux/LinuxScanner.cs	Refactored command building to use scope parameter; extracts --scope flag based on enum value using switch expression
src/Microsoft.ComponentDetection.Detectors/linux/LinuxContainerDetector.cs	Added GetScanScope method to parse detector arguments and pass scope to scanner
test/Microsoft.ComponentDetection.Detectors.Tests/LinuxContainerDetectorTests.cs	Updated mock setups and added comprehensive test cases for scope parameter parsing with various inputs
test/Microsoft.ComponentDetection.Detectors.Tests/LinuxScannerTests.cs	Updated all test calls to include the new scope parameter (defaulting to AllLayers)

[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 🙂

[Copilot]

Pull request overview

Copilot reviewed 7 out of 7 changed files in this pull request and generated no new comments.