Add storage service URLs to env.example for cross-environment deployment

[Copilot]

REDIS_URI, QDRANT_URL, and MEMGRAPH_URI are supported in src/config.py but undocumented in env.example, causing users to believe these are hardcoded Docker-internal addresses.

Changes

• Added storage service connection URLs to env.example under "存储后端配置" section:
  • REDIS_URI - Redis/DragonflyDB connection
  • QDRANT_URL - Qdrant vector DB connection
  • MEMGRAPH_URI - Memgraph graph DB connection

Usage

# Docker internal (default)
REDIS_URI=redis://dragonflydb:6379/0

# External deployment
REDIS_URI=redis://192.168.1.100:6379/0
QDRANT_URL=http://qdrant.prod.internal:6333
MEMGRAPH_URI=bolt://memgraph.prod.internal:7687

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Service discovery URLs hardcoded - breaks cross-environment deployment</issue_title>
<issue_description>## 问题描述
Redis/Qdrant/Memgraph 的 hostname/port 硬编码为 Docker 内部地址，导致跨环境部署失败。

受影响的文件

• src/config.py 行 190-200

硬编码值

• redis://dragonflydb:6379/0
• http://qdrant:6333
• bolt://memgraph:7687

问题

开发、测试、生产环境使用不同的存储地址时无法部署。缺失配置：REDIS_URI、QDRANT_URL、MEMGRAPH_URI 环境变量。

解决方案

应该从 .env 读取这些URL而不是硬编码默认值。</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Service discovery URLs hardcoded - breaks cross-environment deployment #11

---

💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.

[Copilot]

Pull request overview

This PR documents three previously undocumented storage service connection URL environment variables (REDIS_URI, QDRANT_URL, MEMGRAPH_URI) in the env.example file. These variables were already supported in src/config.py but missing from the example configuration, causing users to incorrectly assume that storage service addresses were hardcoded to Docker-internal hostnames. This documentation enables users to properly configure external storage services for cross-environment deployments (development, testing, production).

• Adds documentation for storage service connection URLs under the "存储后端配置" section
• Includes clear warnings about when these variables need to be configured
• Provides examples for both Docker-internal (default) and external deployments

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[BukeLy]

@copilot implement #25 (review)

[Copilot]

@copilot implement #25 (review)

Review #3577353134 is an auto-generated PR overview summary, not a request for changes. It confirms the PR correctly:

• Documents REDIS_URI, QDRANT_URL, MEMGRAPH_URI in env.example
• Includes warnings about cross-environment configuration
• Provides usage examples for Docker and external deployments

The PR is complete as-is. If you have specific changes you'd like me to make, please let me know.