Merge pull request #1012 from atxtechbro/docs/update-knowledge-readme-index

docs(knowledge): add throughput-definition to README index

Author: atxtechbro

knowledge/README.md

@@ -6,5 +6,6 @@ Modular rules automatically discovered by Amazon Q context system.
 When editing these foundational `.amazonq/rules/*.md` files, keep changes small and easy to approve. Avoid long code blocks or extensive additions. Every edit should be easy to say "yes" to without nitpicking.
 
 ## Structure
+- `throughput-definition.md` - **The North Star**: Defines throughput as AI agent management capability for 100x-1000x productivity
 - `principles/` - Foundational truths that rarely change
 - `procedures/` - Actionable processes that evolve