feat: 实现 OpenClaw 纯图数据库对话 Demo

- 基于 DeepSeek API Tool Calls 实现无传统上下文的多轮对话
- 实现全部 6 个 memory 工具:
  - memory_recall: 支持时间范围、多跳路径、会话过滤
  - memory_commit: 批量三元组写入、时间标记
  - memory_purge: 软删除 + superseded 纠错机制
  - memory_introspect: 会话元数据、记忆热点、关系分布
  - memory_archive: 归档旧关系
  - memory_cleanup: 物理清理孤立节点
- Neo4j 真实数据库集成
- 添加各发行版一键启动脚本 (Ubuntu/CentOS/Docker)

scripts/install_neo4j_centos.sh

@@ -0,0 +1,76 @@
+#!/bin/bash
+# Neo4j 一键安装脚本 - CentOS/RHEL/Fedora
+
+set -e
+
+echo "========================================"
+echo "Neo4j 一键安装脚本 - CentOS/RHEL/Fedora"
+echo "========================================"
+
+if [ "$EUID" -eq 0 ]; then
+    SUDO=""
+else
+    SUDO="sudo"
+fi
+
+# 1. 检查 Java
+echo "[1/5] 检查 Java 环境..."
+if command -v java &> /dev/null; then
+    echo "  已安装: $(java -version 2>&1 | head -n 1)"
+else
+    echo "  安装 OpenJDK 17..."
+    $SUDO yum install -y java-17-openjdk-headless
+fi
+
+# 2. 添加 Neo4j 源
+echo "[2/5] 添加 Neo4j 源..."
+$SUDO cat > /etc/yum.repos.d/neo4j.repo << 'EOF'
+[neo4j]
+name=Neo4j Repository
+baseurl=https://yum.neo4j.com/stable
+enabled=1
+gpgcheck=1
+gpgkey=https://debian.neo4j.com/neotechnology.gpg.key
+EOF
+
+# 3. 安装
+echo "[3/5] 安装 Neo4j..."
+$SUDO yum install -y neo4j
+
+# 4. 配置
+echo "[4/5] 配置 Neo4j..."
+$SUDO sed -i 's/#server.default_listen_address=0.0.0.0/server.default_listen_address=0.0.0.0/' /etc/neo4j/neo4j.conf
+
+# 5. 启动
+echo "[5/5] 启动 Neo4j..."
+$SUDO systemctl enable neo4j
+$SUDO systemctl start neo4j
+sleep 3
+
+# 6. 配置 Python 虚拟环境
+echo "[6/6] 配置 Python 虚拟环境..."
+PROJECT_DIR="$HOME/openclaw"
+mkdir -p "$PROJECT_DIR"
+cd "$PROJECT_DIR"
+python3 -m venv venv
+source venv/bin/activate
+pip install --upgrade pip
+pip install neo4j openai
+
+cat > .env << 'EOF'
+DEEPSEEK_API_KEY=your-api-key-here
+NEO4J_URI=bolt://localhost:7687
+NEO4J_USER=neo4j
+NEO4J_PASSWORD=neo4j
+EOF
+
+echo ""
+echo "========================================"
+echo "安装完成!"
+echo "========================================"
+echo "控制台: http://localhost:7474"
+echo "连接: cypher-shell -u neo4j -p neo4j"
+echo ""
+echo "启动对话:"
+echo "  cd $PROJECT_DIR && source venv/bin/activate"
+echo "  python -m openclaw_neo4j_demo"