update: VERSION to v0.6.4 and add development workflow instructions

- Update VERSION file from 0.6.1 to 0.6.4 to match timezone logging release
- Add development workflow instructions to SUMMARY.md for future updates
- Document Claude Code's authority to write commits and push changes
- Establish version consistency requirements across VERSION, SUMMARY.md, and git tags

SUMMARY.md

@@ -249,6 +249,16 @@ sonarr-nfo-cache  | [2025-09-14T09:37:00-04:00] INFO: Batched movie webhook...
 
 ---
 
+## 📝 Development Workflow Instructions
+
+**For Future Updates:**
+- **VERSION File**: Always update the `VERSION` file to match the release version being documented
+- **Commit Authority**: Claude Code is authorized to write commit messages and push changes directly
+- **SUMMARY Updates**: This file serves as the primary project documentation and should be updated with each significant change
+- **Version Consistency**: Ensure VERSION file, SUMMARY.md version, and git tags all align
+
+---
+
 **Last Updated:** September 14, 2025  
-**Version:** v0.6.4-dev  
+**Version:** v0.6.4  
 **Status:** Enhanced Production Ready

VERSION

@@ -1 +1 @@
-0.6.1
+0.6.4