refactor: Update brainstorming workflow roles and documentation

Major role restructuring to improve workflow efficiency and clarity:

## New Roles Added (4)
- product-owner: Backlog management and user story definition
- scrum-master: Sprint planning and agile process facilitation
- ux-expert: User experience optimization and usability testing
- subject-matter-expert: Domain expertise and industry standards

## Roles Removed (5)
- business-analyst → functionality split to product-owner and scrum-master
- feature-planner → merged into product-owner responsibilities
- innovation-lead → integrated into subject-matter-expert
- security-expert → integrated into subject-matter-expert
- user-researcher → merged into ux-expert

## Files Updated
### Command Files (.claude/commands/workflow/brainstorm/)
- Created: product-owner.md, scrum-master.md, ux-expert.md, subject-matter-expert.md
- Deleted: business-analyst.md, feature-planner.md, innovation-lead.md, security-expert.md, user-researcher.md
- Updated: artifacts.md, auto-parallel.md, auto-squeeze.md, synthesis.md

### Planning Templates (.claude/workflows/cli-templates/planning-roles/)
- Created: product-owner.md, scrum-master.md, ux-expert.md, subject-matter-expert.md
- Archived: Moved 5 deprecated roles to _deprecated/ with migration guide
- Added: _deprecated/README.md with deprecation details and migration paths

### Agent Configurations
- Updated conceptual-planning-agent.md with new role mappings
- Updated action-planning-agent.md with new role references

### Documentation
- Updated README.md brainstorming role tables and descriptions
- Updated README_CN.md with Chinese translations for new roles
- Updated workflow documentation files with new role references

## Breaking Changes
Commands for removed roles are no longer available. Use replacement roles:
- /workflow:brainstorm:business-analyst → use product-owner or scrum-master
- /workflow:brainstorm:feature-planner → use product-owner
- /workflow:brainstorm:innovation-lead → use subject-matter-expert
- /workflow:brainstorm:security-expert → use subject-matter-expert
- /workflow:brainstorm:user-researcher → use ux-expert

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

.claude/commands/workflow/brainstorm/synthesis.md

@@ -184,7 +184,7 @@ Strategic overview with key insights, breakthrough opportunities, and implementa
 
 ## Design Specifications
 ### UI/UX Guidelines
-**Consolidated from**: @ui-designer/analysis.md, @user-researcher/analysis.md
+**Consolidated from**: @ui-designer/analysis.md, @ux-expert/analysis.md
 - Component specifications and interaction patterns
 - Visual design system and accessibility requirements
 - User flow and interface specifications
@@ -195,11 +195,11 @@ Strategic overview with key insights, breakthrough opportunities, and implementa
 - Data flow and storage strategy
 - Technology stack decisions
 
-### Security Framework
-**Consolidated from**: @security-expert/analysis.md
-- Authentication and authorization patterns
-- Data protection and compliance requirements
-- Security monitoring and audit strategy
+### Domain Expertise & Standards
+**Consolidated from**: @subject-matter-expert/analysis.md
+- Industry standards and best practices
+- Compliance requirements and regulations
+- Technical quality and domain-specific patterns
 
 ## Implementation Roadmap
 ### Development Phases
@@ -242,7 +242,7 @@ Upon completion, update `workflow-session.json`:
       "status": "completed",
       "synthesis_completed": true,
       "completed_at": "timestamp",
-      "participating_roles": ["product-manager", "system-architect", "ui-designer", "security-expert", "data-architect", ...],
+      "participating_roles": ["product-manager", "product-owner", "scrum-master", "system-architect", "ui-designer", "ux-expert", "data-architect", "subject-matter-expert", "test-strategist"],
       "consolidated_output": {
         "synthesis_specification": ".workflow/WFS-{topic}/.brainstorming/synthesis-specification.md"
       },