260505:1218 chore(node): upgrade to v24.15.0 LTS

- Update Docker base images: node:22-alpine → node:24-alpine
- Add engines.node >=24.0.0 to package.json files
- Create .nvmrc files with 24.15.0
- Update CI workflow to use node-version: 24.15.0
- Fix jest-e2e.json for uuid@13 ES Module compatibility

Validation:
- Backend unit tests: 340/340 passed
- Frontend unit tests: 137/137 passed
- Frontend build: successful (39 static pages)

specs/100-Infrastructures/103-node-upgrade/checklists/requirements.md

@@ -0,0 +1,35 @@
+# Specification Quality Checklist: Node.js Upgrade v22.20.0 → v24.15.0
+
+**Purpose**: Validate specification completeness and quality before proceeding to planning  
+**Created**: 2026-05-05  
+**Feature**: [Node.js Upgrade spec.md](../spec.md)
+
+## Content Quality
+
+- [x] No implementation details (languages, frameworks, APIs)
+- [x] Focused on user value and business needs
+- [x] Written for non-technical stakeholders
+- [x] All mandatory sections completed
+
+## Requirement Completeness
+
+- [x] No [NEEDS CLARIFICATION] markers remain
+- [x] Requirements are testable and unambiguous
+- [x] Success criteria are measurable
+- [x] Success criteria are technology-agnostic (no implementation details)
+- [x] All acceptance scenarios are defined
+- [x] Edge cases are identified
+- [x] Scope is clearly bounded
+- [x] Dependencies and assumptions identified
+
+## Feature Readiness
+
+- [x] All functional requirements have clear acceptance criteria
+- [x] User scenarios cover primary flows
+- [x] Feature meets measurable outcomes defined in Success Criteria
+- [x] No implementation details leak into specification
+
+## Notes
+
+- Feature specification is complete and ready for `/speckit-clarify` or `/speckit-plan`
+- No clarification items needed - the Node.js upgrade scope is well-defined