Release v5.1.1: Fix PM2 ENOENT error on Windows

Bugfix:
- Fixed PM2 ENOENT error on Windows by using full path to PM2 binary
- Improved cross-platform compatibility for PM2 process management

Technical changes:
- Updated scripts/smart-install.js to use full PM2 binary path
- Ensures PM2 commands work correctly on Windows systems
- Bumped version to 5.1.1 in all metadata files

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

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

plugin/.claude-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "claude-mem",
-  "version": "5.1.0",
+  "version": "5.1.1",
   "description": "Persistent memory system for Claude Code - seamlessly preserve context across sessions",
   "author": {
     "name": "Alex Newman"