chore: 忽略 run.sh 运行时 PID 文件

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

.gitignore

@@ -8,6 +8,7 @@ backend/dist/
 
 # Runtime data (JSON file DB, kubeconfigs)
 data/
+*.pid
 
 # Editor directories and files
 .vscode/*

backend/.backend.pid

@@ -1 +0,0 @@
-93376

frontend/.frontend.pid

@@ -1 +0,0 @@
-93417