Remove CLAUDE.md from version control and add to gitignore

- Updated CLAUDE.md with current architecture and recent improvements
- Removed from git tracking to keep as local development resource
- Added to gitignore to prevent future commits

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

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

.gitignore

@@ -16,4 +16,7 @@ dist/
 # Environment variables (secrets)
 .env
 .env.local
-.env.*.local
+.env.*.local
+
+# Development notes (keep local)
+CLAUDE.md