feat: add CodiMD database query helper script

Add db-query-users.sh to simplify running cli-anything-codimd commands:
- list-users: List all users
- user-notes <id>: Show notes for specific user

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

apps/codimd/db-query-users.sh

@@ -0,0 +1,75 @@
+#!/bin/bash
+# CodiMD 資料庫查詢工具
+
+DB_TYPE="postgresql"
+DB_HOST="localhost"
+DB_NAME="codimd"
+DB_USER="codimd"
+DB_PASSWORD="8xG94tL0uKlGiBEd"
+
+# 檢查 port-forward 是否運行
+if ! nc -z localhost 5432 2>/dev/null; then
+    echo "❌ Port-forward 未運行，請先執行: ./db-port-forward.sh"
+    exit 1
+fi
+
+# 檢查 cli-anything-codimd 是否存在
+if ! command -v cli-anything-codimd &> /dev/null; then
+    echo "❌ cli-anything-codimd 未找到"
+    echo "   請先安裝: https://github.com/your-repo/cli-anything-codimd"
+    exit 1
+fi
+
+SCRIPT_NAME=$(basename "$0")
+
+# 如果沒有參數，顯示說明
+if [ -z "$1" ]; then
+    echo "=== CodiMD 資料庫查詢工具 ==="
+    echo ""
+    echo "用法: $SCRIPT_NAME <command> [args]"
+    echo ""
+    echo "指令:"
+    echo "  list-users              列出所有使用者"
+    echo "  user-notes <user-id>    查看特定使用者的筆記"
+    echo ""
+    echo "範例:"
+    echo "  $SCRIPT_NAME list-users"
+    echo "  $SCRIPT_NAME user-notes 33eabf61-c2ad-410e-99e0-19e11d86beec"
+    exit 0
+fi
+
+case "$1" in
+    list-users)
+        cli-anything-codimd admin list-users \
+            --db-type "$DB_TYPE" \
+            --db-host "$DB_HOST" \
+            --db-name "$DB_NAME" \
+            --db-user "$DB_USER" \
+            --db-password "$DB_PASSWORD"
+        ;;
+    user-notes)
+        if [ -z "$2" ]; then
+            echo "用法: $0 user-notes <user-id>"
+            exit 1
+        fi
+        cli-anything-codimd admin user-notes "$2" \
+            --db-type "$DB_TYPE" \
+            --db-host "$DB_HOST" \
+            --db-name "$DB_NAME" \
+            --db-user "$DB_USER" \
+            --db-password "$DB_PASSWORD"
+        ;;
+    *)
+        echo "=== CodiMD 資料庫查詢工具 ==="
+        echo ""
+        echo "用法: $0 <command> [args]"
+        echo ""
+        echo "指令:"
+        echo "  list-users              列出所有使用者"
+        echo "  user-notes <user-id>    查看特定使用者的筆記"
+        echo ""
+        echo "範例:"
+        echo "  $0 list-users"
+        echo "  $0 user-notes 33eabf61-c2ad-410e-99e0-19e11d86beec"
+        ;;
+esac