feat: 增加持仓最高收益缓存和自动止盈机制

[NoFearInMyHeart-G]

增加持仓最高收益缓存和自动止盈机制

功能描述

本次PR新增了两个核心功能来优化交易系统的风险管理：

1. 单币持仓最高收益缓存

• 为每个持仓币种维护最高收益缓存
• 实时跟踪和更新持仓的历史最高收益
• 为回撤计算提供数据基础

2. 定时止盈检查任务

• 新增每分钟执行的定时任务
• 监控所有持仓的收益回撤情况
• 自动止盈条件：
  • 最高收益回撤 >= 40%
  • 当前利润 >= 5%

[github-actions]

🤖 Advisory Check Results

These are advisory checks to help improve code quality. They won't block your PR from being merged.

📋 PR Information

Title Format: ✅ Good - Follows Conventional Commits
PR Size: 🟢 Small (180 lines: +175 -5)

🔧 Backend Checks

Go Formatting: ⚠️ Needs formatting

Files needing formatting

api/server.go
config/database.go
manager/trader_manager.go
trader/auto_trader.go

Go Vet: ✅ Good
Tests: ✅ Passed

Fix locally:

go fmt ./...      # Format code
go vet ./...      # Check for issues
go test ./...     # Run tests

⚛️ Frontend Checks

Build & Type Check: ✅ Success

Fix locally:

cd web
npm run build  # Test build (includes type checking)

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Questions? Feel free to ask in the comments! 🙏

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