Add environment configuration and documentation for various services

- Created .env.example files for Kafka, Kibana, KodBox, Kong, Langfuse, Logstash, n8n, Nginx, OceanBase, OpenCoze, RocketMQ, TiDB, and TiKV.
- Added README.md and README.zh.md files for OceanBase, RocketMQ, TiDB, and TiKV, detailing usage, configuration, and access instructions.
- Implemented docker-compose.yaml files for OceanBase, RocketMQ, TiDB, and TiKV, defining service configurations, health checks, and resource limits.
- Included broker.conf for RocketMQ to specify broker settings.
- Established a consistent timezone (UTC) across all services.
- Provided optional port overrides in .env.example files for flexibility in deployment.

src/duckdb/.env.example

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+# DuckDB version
+DUCKDB_VERSION=v1.1.3
+
+# Timezone
+TZ=UTC

src/duckdb/README.md

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+# DuckDB
+
+DuckDB is an in-process SQL OLAP database management system designed to support analytical query workloads. It's embedded, zero-dependency, and extremely fast.
+
+## Usage
+
+```bash
+docker compose up -d
+```
+
+## Access
+
+### Interactive Shell
+
+Access DuckDB CLI:
+
+```bash
+docker compose exec duckdb duckdb /data/duckdb.db
+```
+
+### Execute Queries
+
+Run queries directly:
+
+```bash
+docker compose exec duckdb duckdb /data/duckdb.db -c "SELECT 1"
+```
+
+### Execute SQL File
+
+```bash
+docker compose exec duckdb duckdb /data/duckdb.db < query.sql
+```
+
+## Example Usage
+
+```sql
+-- Create a table
+CREATE TABLE users (id INTEGER, name VARCHAR);
+
+-- Insert data
+INSERT INTO users VALUES (1, 'Alice'), (2, 'Bob');
+
+-- Query data
+SELECT * FROM users;
+
+-- Load CSV file
+COPY users FROM '/import/users.csv' (HEADER);
+
+-- Export to CSV
+COPY users TO '/data/users_export.csv' (HEADER);
+
+-- Read Parquet file directly
+SELECT * FROM '/import/data.parquet';
+```
+
+## Features
+
+- **Embeddable**: No separate server process needed
+- **Fast**: Vectorized query execution engine
+- **Feature-rich**: Full SQL support with window functions, CTEs, etc.
+- **File formats**: Native support for CSV, JSON, Parquet
+- **Extensions**: PostgreSQL-compatible extensions
+
+## Mounting Data Files
+
+To import data files, mount them as volumes:
+
+```yaml
+volumes:
+  - ./data:/import:ro
+```
+
+Then access files in SQL:
+
+```sql
+SELECT * FROM '/import/data.csv';
+```
+
+## Notes
+
+- DuckDB is designed for analytical (OLAP) workloads, not transactional (OLTP)
+- The database file is stored in `/data/duckdb.db`
+- Data persists in the named volume `duckdb_data`
+- DuckDB can query files directly without importing them
+- For production workloads, ensure sufficient memory is allocated
+
+## References
+
+- [DuckDB Official Documentation](https://duckdb.org/docs/)
+- [DuckDB Docker Image](https://hub.docker.com/r/davidgasquez/duckdb)

src/duckdb/README.zh.md

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+# DuckDB
+
+DuckDB 是一个进程内 SQL OLAP 数据库管理系统，专为支持分析查询工作负载而设计。它是嵌入式的、零依赖的，并且速度极快。
+
+## 使用方法
+
+```bash
+docker compose up -d
+```
+
+## 访问方式
+
+### 交互式 Shell
+
+访问 DuckDB CLI：
+
+```bash
+docker compose exec duckdb duckdb /data/duckdb.db
+```
+
+### 执行查询
+
+直接运行查询：
+
+```bash
+docker compose exec duckdb duckdb /data/duckdb.db -c "SELECT 1"
+```
+
+### 执行 SQL 文件
+
+```bash
+docker compose exec duckdb duckdb /data/duckdb.db < query.sql
+```
+
+## 使用示例
+
+```sql
+-- 创建表
+CREATE TABLE users (id INTEGER, name VARCHAR);
+
+-- 插入数据
+INSERT INTO users VALUES (1, 'Alice'), (2, 'Bob');
+
+-- 查询数据
+SELECT * FROM users;
+
+-- 加载 CSV 文件
+COPY users FROM '/import/users.csv' (HEADER);
+
+-- 导出到 CSV
+COPY users TO '/data/users_export.csv' (HEADER);
+
+-- 直接读取 Parquet 文件
+SELECT * FROM '/import/data.parquet';
+```
+
+## 特性
+
+- **可嵌入**：无需单独的服务器进程
+- **快速**：向量化查询执行引擎
+- **功能丰富**：完整的 SQL 支持，包括窗口函数、CTE 等
+- **文件格式**：原生支持 CSV、JSON、Parquet
+- **扩展**：兼容 PostgreSQL 的扩展
+
+## 挂载数据文件
+
+要导入数据文件，将它们作为卷挂载：
+
+```yaml
+volumes:
+  - ./data:/import:ro
+```
+
+然后在 SQL 中访问文件：
+
+```sql
+SELECT * FROM '/import/data.csv';
+```
+
+## 注意事项
+
+- DuckDB 专为分析（OLAP）工作负载设计，而非事务（OLTP）
+- 数据库文件存储在 `/data/duckdb.db`
+- 数据持久化在命名卷 `duckdb_data` 中
+- DuckDB 可以直接查询文件而无需导入
+- 生产工作负载需确保分配足够的内存
+
+## 参考资料
+
+- [DuckDB 官方文档](https://duckdb.org/docs/)
+- [DuckDB Docker 镜像](https://hub.docker.com/r/davidgasquez/duckdb)

src/duckdb/docker-compose.yaml

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+x-default: &default
+  restart: unless-stopped
+  logging:
+    driver: json-file
+    options:
+      max-size: 100m
+      max-file: "3"
+
+services:
+  duckdb:
+    <<: *default
+    image: davidgasquez/duckdb:${DUCKDB_VERSION:-v1.1.3}
+    command: ["duckdb", "/data/duckdb.db"]
+    stdin_open: true
+    tty: true
+    environment:
+      TZ: ${TZ:-UTC}
+    volumes:
+      - duckdb_data:/data
+      # Mount additional data files
+      # - ./data:/import:ro
+    deploy:
+      resources:
+        limits:
+          cpus: '2.0'
+          memory: 4G
+        reservations:
+          cpus: '0.5'
+          memory: 512M
+    healthcheck:
+      test: ["CMD-SHELL", "duckdb /data/duckdb.db -c 'SELECT 1' || exit 1"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 10s
+
+volumes:
+  duckdb_data: