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/agents/action-planning-agent.md

@@ -82,7 +82,7 @@ Phase 2: Document Generation (Autonomous Output)
     "topic_framework": ".workflow/WFS-auth/.brainstorming/topic-framework.md",
     "role_analyses": [
       ".workflow/WFS-auth/.brainstorming/system-architect/analysis.md",
-      ".workflow/WFS-auth/.brainstorming/security-expert/analysis.md"
+      ".workflow/WFS-auth/.brainstorming/subject-matter-expert/analysis.md"
     ]
   },
   "context_package": {

.claude/agents/conceptual-planning-agent.md

@@ -90,13 +90,12 @@ def handle_brainstorm_assignment(prompt):
 |------|-------------------|--------------|-----------|
 | system-architect | architecture_patterns, scalability_analysis, integration_points | Technical design and system structure | `mcp__exa__get_code_context_exa("microservices patterns")` |
 | ui-designer | user_flow_patterns, component_reuse, design_system_compliance | UI/UX patterns and consistency | `mcp__exa__get_code_context_exa("React design system patterns")` |
-| business-analyst | process_optimization, cost_analysis, efficiency_metrics, workflow_patterns | Business process and ROI | `mcp__exa__get_code_context_exa("business workflow automation")` |
 | data-architect | data_models, flow_patterns, storage_optimization | Data structure and flow | `mcp__exa__get_code_context_exa("database schema patterns")` |
-| security-expert | vulnerability_assessment, threat_modeling, compliance_check | Security risks and compliance | `mcp__exa__get_code_context_exa("security authentication patterns")` |
-| user-researcher | usage_patterns, pain_points, behavior_analysis | User behavior and needs | `mcp__exa__get_code_context_exa("user research methodologies")` |
 | product-manager | feature_alignment, market_fit, competitive_analysis | Product strategy and positioning | `mcp__exa__get_code_context_exa("product management frameworks")` |
-| innovation-lead | emerging_patterns, technology_trends, disruption_potential | Innovation opportunities | `mcp__exa__get_code_context_exa("emerging technology trends")` |
-| feature-planner | implementation_complexity, dependency_mapping, risk_assessment | Development planning | `mcp__exa__get_code_context_exa("agile development patterns")` |
+| product-owner | backlog_management, user_stories, acceptance_criteria | Product backlog and prioritization | `mcp__exa__get_code_context_exa("product backlog management patterns")` |
+| scrum-master | sprint_planning, team_dynamics, process_optimization | Agile process and collaboration | `mcp__exa__get_code_context_exa("scrum agile methodologies")` |
+| ux-expert | usability_optimization, interaction_design, design_systems | User experience and interface | `mcp__exa__get_code_context_exa("UX design patterns")` |
+| subject-matter-expert | domain_standards, compliance, best_practices | Domain expertise and standards | `mcp__exa__get_code_context_exa("industry best practices standards")` |
 
 ### Output Integration
 
@@ -134,12 +133,12 @@ When called, you receive:
 ### Role Options Include:
 - `system-architect` - Technical architecture, scalability, integration
 - `ui-designer` - User experience, interface design, usability
+- `ux-expert` - User experience optimization, interaction design, design systems
 - `product-manager` - Business value, user needs, market positioning
+- `product-owner` - Backlog management, user stories, acceptance criteria
+- `scrum-master` - Sprint planning, team dynamics, agile process
 - `data-architect` - Data flow, storage, analytics
-- `security-expert` - Security implications, threat modeling, compliance
-- `user-researcher` - User behavior, pain points, research insights
-- `business-analyst` - Process optimization, efficiency, ROI
-- `innovation-lead` - Emerging trends, disruptive technologies
+- `subject-matter-expert` - Domain expertise, industry standards, compliance
 - `test-strategist` - Testing strategy and quality assurance
 
 ### Single Role Execution