Improve Architecture and Tutorials navigation

[cdcavell]

Summary

Optimizes the Architecture and Tutorials landing pages to improve scanability, navigation, and progression through ASI Backbone Learning while preserving the existing DocFX-compatible Markdown structure and destination links.

The changes are intentionally focused on two pages that had accumulated the most explanatory density:

• docs/architecture/index.md
• docs/tutorials/index.md

Changes

Architecture

• Added a Start by Question table to help readers enter the architecture material based on what they are trying to understand.
• Moved the recurring governed-execution boundary closer to the top of the page.
• Reframed the core flow around six practical architectural questions:
  • Who proposes the operation?
  • Which facts influence the decision?
  • Where is policy evaluated?
  • What authority exists after approval?
  • Which component performs the side effect?
  • What evidence remains afterward?
• Consolidated architectural status guidance into a more compact Pattern Classifications section.
• Converted foundational organization concepts into a concise reference table.
• Added a clearer Foundational Learning Path section linking directly to the five core tutorials.
• Reworked the large alternative-pattern list into a Compare Adjacent Architectures table organized around the decision each comparison helps answer.
• Preserved working-repository references and all existing destination links.

Tutorials

• Added a compact Learning Path at a Glance table showing:
  • tutorial order
  • difficulty
  • the architectural boundary introduced at each step
• Consolidated the explanation of the problem-first tutorial model.
• Combined Pattern Card and Check Your Understanding guidance into a clearer How a Tutorial Works section.
• Reorganized the five foundational tutorials around their core architectural purpose rather than long topic inventories.
• Preserved the complete governed AI execution flow.
• Strengthened the transition from:
  • Tutorial
  • Executable Sample
  • Hands-On Lab
  • Working Repository
• Reinforced that the curriculum is intended to be questioned, simplified, adapted, or rejected when another design better fits the problem.

Design Goals

• Reduce cognitive load on section landing pages.
• Make first-entry decisions easier for new readers.
• Preserve the problem-first learning model.
• Keep simpler architectural alternatives visible.
• Improve progression from conceptual material into runnable evidence and hands-on practice.
• Preserve all existing DocFX-compatible links and navigation behavior.

Validation

• All existing Architecture links were preserved.
• All existing Tutorials links were preserved.
• git apply --check passed.
• git diff --check passed.
• Only the following files were modified:
  • docs/architecture/index.md
  • docs/tutorials/index.md