Add presentation document for NotebookLM podcast generation

[jeremyeder]

Summary

• Adds structured presentation document covering the 9 key features of this reference repo
• Designed for NotebookLM to generate podcasts about each feature
• Target audience: Principal software engineers evaluating AI-assisted development

Features Covered

1. CBA (Codebase Agent) - Consistent, safe AI assistance
2. Memory System - Modular context loading
3. Issue-to-PR Automation - 10x productivity for routine tasks
4. Layered Architecture - Clear structure AI can reason about
5. Security Patterns - Practical protection without over-engineering
6. Testing Patterns - Pyramid approach
7. CI/CD for Documentation - Automated quality enforcement
8. Self-Review Reflection - Agent quality gate before delivery (NEW)
9. Proactive GHA Workflows - Automated PR review, dependency merging, issue cleanup (NEW)

Format

Each feature section includes:

• Overview (what it is)
• Problem it solves
• How it works
• Benefits for principal engineers

Also includes adoption guidance, common objections/responses, and getting started instructions.

Changes in This Update

• Rebased onto main (now includes PR docs: add proactive GHA workflow patterns #5 and docs: update README with new patterns #6 changes)
• Added Feature 8: Self-Review Reflection
• Added Feature 9: Proactive GHA Workflows (Issue-to-PR, PR Auto-Review, Dependabot Auto-Merge, Stale Issue Management)
• Updated adoption table with new features
• Updated summary to reflect all 9 features
• Added cross-reference from Feature 3 to Feature 9

Validation

• markdownlint passes
• All Mermaid diagrams valid (14 total across repo)