FEAT: Implementation of transactional outbox.

[CesarD]

Description

Implementation of transactional outbox with MassTransit

Related Issue

Closes #95

How Has This Been Tested?

Existing test suite covers it.

Types of changes

• Bug fix (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 change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[Copilot]

Pull Request Overview

This PR implements a transactional outbox pattern using MassTransit's Entity Framework Core integration to ensure reliable message publishing alongside database transactions.

Key changes:

• Adds MassTransit Entity Framework Core outbox configuration to both API and Worker projects
• Updates database schema with outbox and inbox state tables through EF Core migrations
• Modifies message publishing order to occur before database save operations

Reviewed Changes

Copilot reviewed 8 out of 9 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
Program.cs (Worker)	Configures Entity Framework outbox with SQL Server and duplicate detection
Program.cs (API)	Adds outbox configuration with disabled inbox cleanup for API project
AppDbContext.cs	Adds transactional outbox entities to the model
CreateProduct.cs	Reorders operations to publish messages before saving entities
Directory.Packages.props	Adds MassTransit.EntityFrameworkCore package dependency
Migration files	Adds database tables for outbox/inbox state management

Files not reviewed (1)

• src/Content/Backend/Solution/Monaco.Template.Backend.Application/Persistence/Migrations/20250828213955_Init.Designer.cs: Language not supported

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[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	masstransit.entityframeworkcore@​8.5.2

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