docs: update readme

AGENTS.md

@@ -189,7 +189,7 @@ When working on this project, follow this workflow:
 - Implement tests
 
 ### 6. Verify Alignment
-- Ensure code follows Clean/Hexagonal Architecture principles
+- Ensure code follows Hexagonal Architecture principles
 - Verify it aligns with microservices architecture
 - Check that it follows plugin-first design
 - Confirm security-by-design principles are followed
@@ -210,7 +210,7 @@ When working on this project, follow this workflow:
 
 The project follows these core principles (documented in `requirements.md` and `playbook.md`):
 
-1. **Clean/Hexagonal Architecture**
+1. **Hexagonal Architecture**
    - Clear separation between `pkg/` (interfaces) and `internal/` (implementations)
    - Domain code in `internal/domain`
    - Only interfaces exported from `pkg/`
@@ -272,7 +272,7 @@ After implementing a feature, verify:
 2. **Committing without verification** - Never commit code that doesn't build, has failing tests, or doesn't meet acceptance criteria
 3. **Implementing without checking stories** - Stories contain specific deliverables and acceptance criteria
 4. **Ignoring ADRs** - ADRs document why decisions were made; don't reinvent the wheel
-5. **Violating architecture principles** - Code must follow Clean/Hexagonal Architecture
+5. **Violating architecture principles** - Code must follow Hexagonal Architecture
 6. **Missing acceptance criteria** - All stories have specific criteria that must be met
 7. **Not following module patterns** - Modules must implement the `IModule` interface correctly
 8. **Skipping observability** - All features must include proper logging, metrics, and tracing