MINOR CODE RUB: Code Cleanup

[glhays]

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[Copilot]

Pull Request Overview

A minor code cleanup reducing unused references and correcting naming inconsistencies.

• Changed the exception parameter type in FailedOperationContributionException from DbUpdateException to Exception.
• Renamed the misnamed variable in SourcesController from "sourcees" to "sources".
• Removed unused using statements and temporary file references in project and test files.

Reviewed Changes

Copilot reviewed 18 out of 18 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
GitFyle.Core.Api/Models/Foundations/Contributions/Exceptions/FailedOperationContributionException.cs	Changed exception parameter type and removed unused members to simplify the exception.
GitFyle.Core.Api/GitFyle.Core.Api.csproj	Removed a temporary file reference from the project file.
GitFyle.Core.Api/Controllers/SourcesController.cs	Renamed misnamed variable from "sourcees" to "sources" for clarity.
GitFyle.Core.Api.Tests.Unit/Controllers/Contributions/ContributionsControllerTests.Exceptions.Put.cs	Removed unused using statements for cleanup.
GitFyle.Core.Api.Tests.Unit/Controllers/ContributionTypes/ContributionTypesControllerTests.Exceptions.Delete.cs	Removed an unneeded using statement.
GitFyle.Core.Api.Tests.Acceptance/Apis/Repositories/RepositoriesApiTests.cs	Removed unused using statement from acceptance tests.