[feature] Block protected POSIX paths from data sources

[paul-fresquet]

[feature] Block protected POSIX paths from data sources

Summary

• Block protected POSIX system paths (and subpaths) when adding local data sources
• Add defense-in-depth rejection during inventory builder setup
• Add localized user feedback and logging for blocked paths
• Bump protocol version to V2 and update related tests

Main Changes

• Added ProtectedPaths utility and unit tests
• Integrated checks in DataSourceChecker and InventoryBuilder
• Updated resources for new error messages
• Updated protocol version constants and tests

Implementation Details

• Path checks use Path.GetFullPath + TrimEndingDirectorySeparator and match exact or subpaths
• Enforcement is local-only (by ClientInstanceId) to avoid blocking remote data sources
• InventoryBuilderFactory catches per-source exceptions to keep other sources

Closes #260

[sonarqubecloud]

Quality Gate passed

Issues
8 New issues
0 Accepted issues

Measures
0 Security Hotspots
82.1% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud