AuthZ: Architectural Strategy & Design

[MaferMazu]

This issue will be used to track the following deliverables:

• Technical Architecture Document + ADRs: This is the central document outlining the overall technical architecture and key decisions.
• Q&A document on architectural decisions: This supports the main architecture document by addressing specific questions and providing deeper context for choices made.
• Architecture diagrams and integration flows: These are the visual representations that communicate the system's structure and how components interact.