feat: add redis sentinel support

[ruanimal]

⚠️ 提交说明 / PR Notice

Important

• 请提供人工撰写的简洁摘要，避免直接粘贴未经整理的 AI 输出。

📝 变更描述 / Description

增加 redis 哨兵支持

🚀 变更类型 / Type of change

• 🐛 Bug 修复 (Bug fix) - 请关联对应 Issue，避免将设计取舍、理解偏差或预期不一致直接归类为 bug
• ✨ 新功能 (New feature) - 重大特性建议先通过 Issue 沟通
• ⚡ 性能优化 / 重构 (Refactor)
• 📝 文档更新 (Documentation)

🔗 关联任务 / Related Issue

• Closes # (如有)

✅ 提交前检查项 / Checklist

• 人工确认: 我已亲自整理并撰写此描述，没有直接粘贴未经处理的 AI 输出。
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(请在此粘贴截图、关键日志或测试报告，以证明变更生效)

Summary by CodeRabbit

• New Features

  • Added support for connecting to Redis through Sentinel for improved availability.
  • Added configuration options for Sentinel addresses, master name, authentication, password, and database selection.
  • Redis can now be disabled when neither standalone nor Sentinel configuration is provided.

• Documentation

  • Updated the environment configuration example with guidance on standalone and Sentinel modes.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: bcbfea46-5637-448a-91cc-421cb9d1f935

📥 Commits

Reviewing files that changed from the base of the PR and between a63364d and 405d3c3.

📒 Files selected for processing (2)

• .env.example
• common/redis.go

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Walkthrough

Redis initialization now supports standalone and Redis Sentinel modes. The example environment file documents Sentinel addresses, master name, credentials, database, and pool-related settings, while the Redis client selects and configures the appropriate connection mode.

Changes

Redis Sentinel support

Layer / File(s)	Summary
Redis mode configuration and routing .env.example, common/redis.go	Redis environment documentation distinguishes standalone and Sentinel modes, and InitRedisClient selects the client mode based on configured variables.
Sentinel failover client construction common/redis.go	Sentinel addresses are parsed and combined with master name, credentials, database, and pool settings to create a Redis failover client.

Estimated code review effort: 2 (Simple) | ~10 minutes

Sequence Diagram(s)

sequenceDiagram
  participant Environment
  participant InitRedisClient
  participant initRedisSentinel
  participant RedisSentinel
  Environment->>InitRedisClient: Provide Redis and Sentinel settings
  InitRedisClient->>initRedisSentinel: Select Sentinel mode
  initRedisSentinel->>RedisSentinel: Build failover client options
  RedisSentinel-->>InitRedisClient: Return configured Redis client

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Suggested reviewers: calcium-ion

Poem

A rabbit hops through Sentinel’s glow,
Finding Redis masters in a row.
Addresses split, credentials align,
Failover clients now work just fine.
“Hop-hop!” says Bun, “the cache can go!”

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: adding Redis Sentinel support.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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