add architecture documentation and testing strategy

Co-authored-by: Copilot <copilot@github.com>
2026-04-27 18:19:40 +02:00
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+# 12. Glossary
+
+The most important domain and technical terms that stakeholders use when discussing the system.
+
+| Term          | Definition                                                                              |
+| ------------- | --------------------------------------------------------------------------------------- |
+| AI            | Artificial Intelligence — machine learning models that generate text, images, or video  |
+| API           | Application Programming Interface — HTTP endpoints exposed by the FastAPI backend       |
+| JWT           | JSON Web Token — signed token used for stateless authentication                         |
+| DuckDB        | Embedded analytical database used for persistent storage                                |
+| FastAPI       | Python async web framework used for the backend                                         |
+| Flask         | Python web framework used for the frontend                                              |
+| openrouter.ai | Third-party API aggregator providing access to multiple AI model providers              |
+| ADR           | Architecture Decision Record — a document capturing an important architectural decision |
+| HTTPS         | Hypertext Transfer Protocol Secure — encrypted HTTP communication                       |