feat(inspect): Delete model training job

[ActiveChooN]

Added deletion of the training job related to the model
Fixed version of #3134

📝 Description

• Provide a clear summary of the changes and the issue that has been addressed.
• 🛠️ Fixes # (issue number)

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[Copilot]

Pull request overview

This PR adds functionality to delete the training job associated with a model when the model itself is deleted, preventing orphaned training job records in the database.

• Imports JobRepository to enable training job deletion
• Updates delete_model method to delete associated training job if it exists
• Adds comprehensive test coverage for the new deletion behavior

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
application/backend/src/services/model_service.py	Imports JobRepository and adds logic to delete the training job when deleting a model
application/backend/tests/unit/services/test_model_service.py	Adds test case to verify training job deletion when model is deleted

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.

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