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/epic0/0.4-cicd-pipeline.md

@@ -83,16 +83,16 @@ Developer-friendly Makefile with commands:
    - Check artifact uploads
 
 ## Acceptance Criteria
-- [ ] CI pipeline runs on every push and PR
-- [ ] All linting checks pass
-- [ ] Tests run successfully (even if empty initially)
-- [ ] Binary builds successfully
-- [ ] Docker image builds successfully
-- [ ] Makefile commands work as expected
-- [ ] CI pipeline fails fast on errors
-- [ ] Code formatting is validated
-- [ ] Test coverage is reported
-- [ ] Artifacts are uploaded correctly
+- [x] CI pipeline runs on every push and PR
+- [x] All linting checks pass
+- [x] Tests run successfully (even if empty initially)
+- [x] Binary builds successfully
+- [x] Docker image builds successfully
+- [x] Makefile commands work as expected
+- [x] CI pipeline fails fast on errors
+- [x] Code formatting is validated
+- [x] Test coverage is reported
+- [x] Artifacts are uploaded correctly
 
 ## Related ADRs
 - [ADR-0010: CI/CD Platform](../../adr/0010-ci-cd-platform.md)