Add restart command, fix post-update restarts as well.

plugin/commands/restart.md

@@ -0,0 +1,21 @@
+# Restart Claude Mnemonic Worker
+
+Restart the claude-mnemonic worker process. Use this command when experiencing issues with the memory system.
+
+## Instructions
+
+1. Call the restart API endpoint using curl:
+   ```bash
+   curl -X POST http://127.0.0.1:37777/api/restart
+   ```
+
+2. Wait a moment for the worker to restart (typically 1-2 seconds)
+
+3. Verify the worker is running by checking the version:
+   ```bash
+   curl -s http://127.0.0.1:37777/api/version
+   ```
+
+4. Report the result to the user, including the version number from the response.
+
+If the restart fails, suggest the user check `/tmp/claude-mnemonic-worker.log` for errors.