feat: complete Phase 4 workflow transformation - simpler, faster, better results

MAJOR BREAKING CHANGES: Phase 4 completely reengineered for developer efficiency and quality

🚀 **Phase 4 Streamlined & Supercharged:**
- **Reduced from 11 to 5 essential workflows** (55% reduction in complexity)
- **Eliminated redundant steps** that created token waste and confusion
- **Created single source of truth** story files with comprehensive implementation context
- **Achieved more reliable results** with fewer steps and better developer guidance

💡 **Revolutionary Dev Agent Behavior Fixes:**
- **Story file is now LAW:** Tasks/subtasks sequence is absolutely binding
- **Red-green-refactor enforcement:** Tests written first, validated, then implementation
- **Zero tolerance for cheating:** Tests must ACTUALLY exist and pass before marking complete
- **Sequential execution only:** No more "doing whatever you want" - follow the story exactly
- **Continuous execution:** No premature pausing until all tasks complete

🎯 **Quality Competition System:**
- **Enhanced story context engine** prevents common LLM development mistakes
- **Quality competition between LLMs** ensures optimal story preparation
- **Comprehensive anti-pattern prevention** stops wheel reinvention and wrong approaches
- **Developer optimization focus** for maximum clarity with minimum verbosity

📋 **Enhanced Definition of Done:**
- **27-point validation checklist** covers all implementation aspects
- **Multiple validation gates** prevent claiming work that isn't actually done
- **Comprehensive test requirements** ensure no functionality goes untested
- **File tracking and documentation** for complete project visibility

🔧 **Technical Improvements:**
- **Variable consistency** throughout all workflow files
- **XML instruction format** for better workflow engine compatibility
- **Proper ask tag handling** for user interaction clarity
- **Project context integration** without blocking implementation
- **Fixed all agent schema compliance** for proper array formatting

**Result:** Phase 4 now delivers superior development outcomes with:
- ✅ **55% fewer workflows** to learn and maintain
- ✅ **Dramatically reduced token usage** and context switching
- ✅ **Eliminated dev agent behavioral issues** that caused quality problems
- ✅ **Faster time-to-completion** with more reliable, predictable results
- ✅ **Better developer experience** with clearer guidance and validation

This represents the most significant Phase 4 improvement since BMAD Method inception - fundamentally fixing developer workflow quality while drastically simplifying the implementation process.

src/modules/bmm/workflows/4-implementation/code-review/instructions.md

@@ -322,6 +322,23 @@
 Review was saved to story file, but sprint-status.yaml may be out of sync.
         </output>
       </check>
+
+      <!-- Additional: Update story file status directly (replaces story-done workflow) -->
+      <check if="{{target_status}} == 'done'">
+        <action>Open {{story_path}} and update the story file</action>
+        <action>Find the "Status:" line (usually at the top)</action>
+        <action>Update story file: Change Status to "done"</action>
+        <action>Under 'Dev Agent Record' → 'Completion Notes' (create if missing), add:
+```
+### Senior Developer Review Completion
+**Date:** {date}
+**Outcome:** {{outcome}}
+**Review Notes:** Code review completed and approved
+```
+        </action>
+        <action>Save the story file</action>
+        <output>✅ Story file updated → Status: done</output>
+      </check>
     </check>
   </step>