feat: Validate commit messages

[ezr-ondrej]

Overview

This PR is proposing validation of commit massages to start conforming to common style.
It describes the proposed style in the CONTRIBUTING.md

Summary by Sourcery

Enforce a standardized commit message style by adding validation in CI and documenting the Angular Conventional Commits format

New Features:

• Add automated commit message validation to the CI workflow

CI:

• Integrate host_inventory_changelog commit-check into GitHub Actions checks

Documentation:

• Introduce Angular Conventional Commits guidelines in CONTRIBUTING.md with format, types, scope, examples, and best practices

[sourcery-ai]

Reviewer's Guide

This PR integrates automated commit message validation into the CI pipeline and adds detailed commit style guidelines to the CONTRIBUTING documentation.

File-Level Changes

Change	Details	Files
Add commit message validation step in CI workflow	Introduce a secondary checkout for the changelog repository Install the host_inventory_changelog package Invoke the commit-check command against the PR head	.github/workflows/checks.yaml
Document Angular Conventional Commits style in CONTRIBUTING	Define commit message format, types, and required ticket scope Provide examples for common commit types Outline subject line guidelines and mandatory conventions	CONTRIBUTING.md

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