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/epic1/1.5-http-server.md

@@ -4,7 +4,7 @@
 - **Story ID**: 1.5
 - **Title**: HTTP Server Foundation with Middleware Stack
 - **Epic**: 1 - Core Kernel & Infrastructure
-- **Status**: Pending
+- **Status**: Completed
 - **Priority**: High
 - **Estimated Time**: 6-8 hours
 - **Dependencies**: 1.1, 1.3, 1.4
@@ -80,15 +80,15 @@ This story implements a complete HTTP server using Gin with a comprehensive midd
    - Test graceful shutdown
 
 ## Acceptance Criteria
-- [ ] HTTP server starts successfully
-- [ ] All middleware executes in correct order
-- [ ] Request IDs are generated and logged
-- [ ] Metrics are collected for all requests
-- [ ] Panics are recovered and handled
-- [ ] Graceful shutdown works correctly
-- [ ] Server is configurable via config system
-- [ ] CORS is configurable per environment
-- [ ] All core endpoints work correctly
+- [x] HTTP server starts successfully
+- [x] All middleware executes in correct order
+- [x] Request IDs are generated and logged
+- [x] Metrics are collected for all requests
+- [x] Panics are recovered and handled
+- [x] Graceful shutdown works correctly
+- [x] Server is configurable via config system
+- [x] CORS is configurable per environment
+- [x] All core endpoints work correctly
 
 ## Related ADRs
 - [ADR-0006: HTTP Framework](../../adr/0006-http-framework.md)