docs: release v4.6.2 - documentation optimization and /memory:load refinement

### Documentation Optimization

**Optimized `/memory:load` Command Specification**:
- Reduced documentation from 273 to 240 lines (12% reduction)
- Merged redundant sections for better information flow
- Removed unnecessary internal implementation details
- Simplified usage examples while preserving clarity
- Maintained all critical information (parameters, workflow, JSON structure)

### Documentation Updates

**CHANGELOG.md**:
- Added v4.6.2 release entry with documentation improvements

**COMMAND_SPEC.md**:
- Updated `/memory:load` specification to match actual implementation
- Corrected syntax: `[--tool gemini|qwen]` instead of outdated `[--agent] [--json]` flags
- Added agent-driven execution details

**GETTING_STARTED.md**:
- Added "Quick Context Loading for Specific Tasks" section
- Positioned between "Full Project Index Rebuild" and "Incremental Related Module Updates"
- Includes practical examples and use case guidance

**README.md**:
- Updated version badge to v4.6.2
- Updated latest release description

**COMMAND_REFERENCE.md**:
- Added `/memory:load` command reference entry

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

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

README.md

@@ -2,7 +2,7 @@
 
 <div align="center">
 
-[![Version](https://img.shields.io/badge/version-v4.6.0-blue.svg)](https://github.com/catlog22/Claude-Code-Workflow/releases)
+[![Version](https://img.shields.io/badge/version-v4.6.2-blue.svg)](https://github.com/catlog22/Claude-Code-Workflow/releases)
 [![License](https://img.shields.io/badge/license-MIT-green.svg)](LICENSE)
 [![Platform](https://img.shields.io/badge/platform-Windows%20%7C%20Linux%20%7C%20macOS-lightgrey.svg)]()
 [![MCP Tools](https://img.shields.io/badge/🔧_MCP_Tools-Experimental-orange.svg)](https://github.com/modelcontextprotocol)
@@ -15,7 +15,7 @@
 
 **Claude Code Workflow (CCW)** transforms AI development from simple prompt chaining into a robust, context-first orchestration system. It solves execution uncertainty and error accumulation through structured planning, deterministic execution, and intelligent multi-model orchestration.
 
-> **🎉 Latest: v4.6.0** - Concept Clarification & Agent-Driven Analysis. See [CHANGELOG.md](CHANGELOG.md) for details.
+> **🎉 Latest: v4.6.2** - Documentation Optimization & `/memory:load` Command Refinement. See [CHANGELOG.md](CHANGELOG.md) for details.
 
 > 📚 **New to CCW?** Check out the [**Getting Started Guide**](GETTING_STARTED.md) for a beginner-friendly 5-minute tutorial!