docs: Enhance README with DDD learning resource note

[devin-ai-integration]

docs: Enhance README with DDD learning resource note

Summary

Added a single sentence to the README's "About" section to explicitly clarify that this project serves as a practical learning resource for teams implementing Domain-Driven Design patterns. This small documentation enhancement helps set clearer expectations for users discovering the project and better positions it as an educational resource.

Review & Testing Checklist for Human

• Verify the added sentence accurately reflects the project's purpose and goals
• Check that the new sentence flows well with the existing paragraph and maintains consistent tone
• Ensure the grammar and readability of the updated About section

Notes

This is a minimal documentation change with no functional impact on the application. No code testing required.

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Initiated by: Callum Miles (@callummiles)
Link to Devin run: https://app.devin.ai/sessions/365e8709d5154671a9e6dd26d159ae29

[devin-ai-integration]

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