feat: reword phase to epic, update mkdocs

docs/content/stories/epic8/8.4-final-polish.md

@@ -0,0 +1,63 @@
+# Story 8.4: Final Polish and Optimization
+
+## Metadata
+- **Story ID**: 8.4
+- **Title**: Final Polish and Optimization
+- **Epic**: 8 - Advanced Features & Polish
+- **Status**: Pending
+- **Priority**: Medium
+- **Estimated Time**: 8-10 hours
+- **Dependencies**: All previous epics
+
+## Goal
+Final polish, bug fixes, performance optimization, and security audit.
+
+## Description
+This story covers final polish including code review, refactoring, bug fixes, performance profiling, security audit, and documentation review.
+
+## Deliverables
+
+### 1. Code Review and Refactoring
+- Code review of all modules
+- Refactor for consistency
+- Improve code quality
+- Remove dead code
+
+### 2. Bug Fixes
+- Fix identified bugs
+- Address technical debt
+- Improve error handling
+
+### 3. Performance Profiling
+- Profile critical paths
+- Optimize bottlenecks
+- Add database query caching
+- Optimize N+1 queries
+- Add response caching (Redis)
+- Implement connection pooling optimizations
+- Add database read replicas support
+
+### 4. Security Audit
+- Security review
+- Fix security issues
+- Update dependencies
+- Security best practices
+
+### 5. Documentation Review
+- Review all documentation
+- Update outdated docs
+- Add missing documentation
+- Improve examples
+
+## Acceptance Criteria
+- [ ] Code quality is high
+- [ ] Bugs are fixed
+- [ ] Performance is optimized
+- [ ] Security audit passes
+- [ ] Documentation is complete
+
+## Files to Create/Modify
+- All code files (refactoring)
+- Documentation files (review)
+- Performance optimizations
+