feat: add CodiMD database port-forward helper scripts

Add three scripts to simplify CodiMD database access via port-forward:
- db-port-forward.sh: Start SSH tunnel and kubectl port-forward
- db-port-forward-stop.sh: Stop port-forward processes
- db-status.sh: Check port-forward status

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/codimd/db-port-forward-stop.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+# 停止 CodiMD 資料庫 Port Forward
+
+echo "=== 停止 CodiMD 資料庫 Port Forward ==="
+
+# 方法 1: 使用保存的 PID
+if [ -f /tmp/codimd-db-port-forward.pid ]; then
+    PID=$(cat /tmp/codimd-db-port-forward.pid)
+    if ps -p $PID > /dev/null 2>&1; then
+        kill $PID
+        echo "✅ 已終止 PID: $PID"
+        rm -f /tmp/codimd-db-port-forward.pid
+        exit 0
+    else
+        echo "⚠️  PID $PID 不存在，嘗試其他方法..."
+        rm -f /tmp/codimd-db-port-forward.pid
+    fi
+fi
+
+# 方法 2: 使用 pgrep
+PIDS=$(pgrep -f "port-forward.*codimd-db")
+if [ -n "$PIDS" ]; then
+    echo "找到運行中的 port-forward process(es):"
+    echo "$PIDS"
+    pkill -f "port-forward.*codimd-db"
+    echo "✅ 已終止所有相關 process"
+    exit 0
+fi
+
+echo "❌ 沒有找到運行中的 port-forward"
+exit 1

apps/codimd/db-port-forward.sh

@@ -0,0 +1,51 @@
+#!/bin/bash
+# 啟動 CodiMD 資料庫 Port Forward
+
+DB_SVC="codimd-db"
+DB_NAMESPACE="default"
+LOCAL_PORT="5432"
+REMOTE_PORT="5432"
+REMOTE_HOST="ubuntu@192.168.42.120"
+
+echo "=== 啟動 CodiMD 資料庫 Port Forward ==="
+
+# 檢查是否已經在運行
+if pgrep -f "port-forward.*${DB_SVC}" > /dev/null; then
+    echo "⚠️  Port-forward 已經在運行中"
+    echo "   使用 ./db-port-forward-stop.sh 來停止"
+    exit 1
+fi
+
+# 透過 SSH 執行 kubectl port-forward
+ssh -L ${LOCAL_PORT}:localhost:${REMOTE_PORT} ${REMOTE_HOST} \
+    "sudo kubectl port-forward -n ${DB_NAMESPACE} svc/${DB_SVC} ${LOCAL_PORT}:${REMOTE_PORT}" \
+    &
+
+PF_PID=$!
+echo $PF_PID > /tmp/codimd-db-port-forward.pid
+
+# 等待 port 開始監聽
+echo "⏳ 等待 port-forward 建立..."
+for i in {1..10}; do
+    if nc -z localhost ${LOCAL_PORT} 2>/dev/null; then
+        echo "✅ Port-forward 已建立: localhost:${LOCAL_PORT} -> ${DB_SVC}:${REMOTE_PORT}"
+        echo "   PID: $PF_PID"
+        echo ""
+        echo "現在可以使用 cli-anything-codimd:"
+        echo ""
+        echo "   cli-anything-codimd admin list-users \\"
+        echo "     --db-type postgresql \\"
+        echo "     --db-host localhost \\"
+        echo "     --db-name codimd \\"
+        echo "     --db-user codimd \\"
+        echo "     --db-password 8xG94tL0uKlGiBEd"
+        echo ""
+        echo "停止方式: ./db-port-forward-stop.sh"
+        exit 0
+    fi
+    sleep 1
+done
+
+echo "❌ Port-forward 建立失敗"
+rm -f /tmp/codimd-db-port-forward.pid
+exit 1

apps/codimd/db-status.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+# 檢查 CodiMD 資料庫 Port Forward 狀態
+
+echo "=== CodiMD 資料庫 Port Forward 狀態 ==="
+
+if pgrep -f "port-forward.*codimd-db" > /dev/null; then
+    PIDS=$(pgrep -f "port-forward.*codimd-db")
+    echo "✅ Port-forward 正在運行"
+    echo "   PID(s): $PIDS"
+
+    # 檢查 port 是否可連接
+    if nc -z localhost 5432 2>/dev/null; then
+        echo "✅ Port 5432 可連接"
+    else
+        echo "⚠️  Port 5432 無法連接"
+    fi
+    exit 0
+else
+    echo "❌ Port-forward 未運行"
+    echo ""
+    echo "啟動方式: ./db-port-forward.sh"
+    exit 1
+fi