refactor: consolidate workflow documentation into unified architecture

- Create unified workflow-architecture.md combining:
  - data-model.md (JSON-only architecture, task schemas)
  - file-structure-standards.md (progressive structures, templates)
  - session-management-principles.md (marker files, session ops)
  - complexity-rules.md (classification thresholds, behaviors)

- Update 11 files with references to new consolidated document
- Remove redundant documentation while preserving all functionality
- Streamline maintenance with single source of truth

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

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

.claude/commands/task/breakdown.md

@@ -15,7 +15,7 @@ examples:
 Intelligently breaks down complex tasks into manageable subtasks with automatic context distribution and agent assignment.
 
 ## Core Principles
-**Task Schema:** @~/.claude/workflows/data-model.md
+**Task Schema:** @~/.claude/workflows/workflow-architecture.md
 
 ## Features
 

.claude/commands/task/create.md

@@ -15,7 +15,7 @@ examples:
 Creates new implementation tasks during IMPLEMENT phase with automatic context awareness and ID generation.
 
 ## Core Principles
-**Task Management:** @~/.claude/workflows/data-model.md
+**Task Management:** @~/.claude/workflows/workflow-architecture.md
 
 ## Features
 

.claude/commands/task/execute.md

@@ -12,7 +12,7 @@ examples:
 ### 🚀 **Command Overview: `/task:execute`**
 
 -   **Purpose**: Executes tasks using intelligent agent selection, context preparation, and progress tracking.
--   **Core Principles**: @~/.claude/workflows/data-model.md
+-   **Core Principles**: @~/.claude/workflows/workflow-architecture.md
 
 ### ⚙️ **Execution Modes**
 

.claude/commands/task/replan.md

@@ -15,7 +15,7 @@ examples:
 Replans individual tasks based on detailed user input with comprehensive change tracking, version management, and document synchronization. Focuses exclusively on single-task modifications with rich input options.
 
 ## Core Principles
-**Task Management:** @~/.claude/workflows/data-model.md
+**Task Management:** @~/.claude/workflows/workflow-architecture.md
 
 ## Single-Task Focus
 This command operates on **individual tasks only**. For workflow-wide changes, use `/workflow:action-plan` instead.