docs: verify and update Epic 1 story statuses to Completed

- Verified all acceptance criteria for Stories 1.1-1.6
- Updated Status fields from Pending to Completed
- Marked all acceptance criteria checkboxes as completed
- All stories in Epic 1 are now fully implemented and verified

docs/content/stories/epic1/1.1-enhanced-di-container.md

@@ -4,7 +4,7 @@
 - **Story ID**: 1.1
 - **Title**: Enhanced Dependency Injection Container
 - **Epic**: 1 - Core Kernel & Infrastructure
-- **Status**: Pending
+- **Status**: Completed
 - **Priority**: High
 - **Estimated Time**: 3-4 hours
 - **Dependencies**: 0.5
@@ -61,13 +61,13 @@ Complete provider functions for all core services:
    - Test lifecycle hooks
 
 ## Acceptance Criteria
-- [ ] All core services are provided via DI container
-- [ ] Services are initialized in correct dependency order
-- [ ] Lifecycle hooks work for all services
-- [ ] Services can be overridden for testing
-- [ ] DI container compiles without errors
-- [ ] CoreModule can be imported and used
-- [ ] Error handling works during initialization
+- [x] All core services are provided via DI container
+- [x] Services are initialized in correct dependency order
+- [x] Lifecycle hooks work for all services
+- [x] Services can be overridden for testing
+- [x] DI container compiles without errors
+- [x] CoreModule can be imported and used
+- [x] Error handling works during initialization
 
 ## Related ADRs
 - [ADR-0003: Dependency Injection Framework](../../adr/0003-dependency-injection-framework.md)