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  - memory_purge: 软删除 + superseded 纠错机制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/start_neo4j_docker.sh

@@ -0,0 +1,63 @@
+#!/bin/bash
+# Neo4j Docker 一键启动脚本
+
+set -e
+
+echo "========================================"
+echo "Neo4j Docker 启动脚本"
+echo "========================================"
+
+# 检查 Docker
+if ! command -v docker &> /dev/null; then
+    echo "Error: Docker 未安装"
+    exit 1
+fi
+
+# 检查并停止现有容器
+if docker ps -a | grep -q openclaw-neo4j; then
+    echo "[Info] 停止现有容器..."
+    docker stop openclaw-neo4j 2>/dev/null || true
+    docker rm openclaw-neo4j 2>/dev/null || true
+fi
+
+# 启动 Neo4j
+echo "[Info] 启动 Neo4j 容器..."
+docker run -d \
+    --name openclaw-neo4j \
+    -p 7474:7474 \
+    -p 7687:7687 \
+    -e NEO4J_AUTH=neo4j/neo4j \
+    -e NEO4J_PLUGINS='["apoc"]' \
+    neo4j:5
+
+echo "[Info] 等待 Neo4j 启动..."
+sleep 15
+
+# 配置 Python 虚拟环境
+echo "[Info] 配置 Python 虚拟环境..."
+PROJECT_DIR="$HOME/openclaw"
+mkdir -p "$PROJECT_DIR"
+cd "$PROJECT_DIR"
+python3 -m venv venv 2>/dev/null || python3 -m virtualenv 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 "启动完成!"
+echo "========================================"
+echo "HTTP: http://localhost:7474"
+echo "Bolt: bolt://localhost:7687"
+echo "用户: neo4j / neo4j"
+echo ""
+echo "启动对话:"
+echo "  cd $PROJECT_DIR && source venv/bin/activate"
+echo "  python /home/program/graph_enable_ability/openclaw_neo4j_demo.py"