Add source path metadata to configuration backups

[sat-06]

Fixes #444

Summary

Adds source configuration path metadata to WinHome configuration backups.

Changes

• Added SourcePath field to backup metadata model.

• Updated IConfigBackupService to accept a source configuration path.

• Passed the active configuration file path from Program.cs during backup creation.

• Persisted source path information in generated backup files.

• Added unit tests for:

  • Backup file creation
  • Missing restore file handling
  • Source path metadata persistence

Testing

• dotnet build
• dotnet test

All tests pass successfully.

[sat-06]

Hey @DotDev262
I have implemented the solution for the issue.
All the tests passed locally.
Plz let me know if there are any changes from my side.

[DotDev262]

This PR adds SourcePath metadata to backups, which is a building block for #444 (Configuration Drift Detection). However, partial/split submissions for a single issue are not accepted — the full drift detection feature (comparison logic, reporting, CLI command) must be delivered in one PR.

Please either:

1. Extend this PR to implement the complete drift detection feature (compare current vs. desired state, generate a report across supported config types).
2. Close this PR and submit a single PR that implements the full scope of Add Configuration Drift Detection and Reporting #444 once ready.

Happy to review the complete feature when it lands.

[sat-06]

Hi @DotDev262

I have implemented the changes and have updated the pr.

Changes included:

• Added config drift CLI command

• Added IConfigDriftService and ConfigDriftService

• Added ConfigDriftResult model for drift reporting

• Integrated drift detection into the configuration workflow

• Added backup metadata support (SourcePath)

• Added unit tests covering:

  • Missing backup file
  • No drift detected
  • Drift detected when settings differ

Validation:

• dotnet build passes
• dotnet test passes

This addresses the requested drift detection workflow and reporting functionality from issue #444.

[DotDev262]

Full drift detection implementation delivered. Build passes (0 errors, 0 warnings), all 3 drift tests pass. Approved and ready to merge.