Filetracking final g2 sreelekha karan

[devverse06]

Issue that this pull request solves

Closes: #

Proposed changes

Brief description of what is fixed or changed

This PR updates the File Tracking backend with the new workflow-aware implementation, including the API layer, workflow utilities, selectors, services, signals, management command, migrations, and the test package.

It also replaces the old tests.py layout with a package-based test structure at applications/filetracking/tests/test_module.py and adds Fusion/settings/test_no_serialize.py for running focused tests during the migration phase.

Types of changes

Put an x in the boxes that apply

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Other (backend refactor and test structure update)

Checklist

Put an x in the boxes that apply

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have created new branch for this pull request
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• My changes does not break the current system and it passes all the current test cases.

Screenshots

Not applicable for backend changes.

Other information

The branch filetracking-final-g2-sreelekha-karan has been pushed to the forked repository.

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