docs: Update architecture docs with platform infrastructure details

- Add platform infrastructure chapter to frontend-backend architecture design
- Update system architecture document with 6 new infrastructure modules
- Update AI onboarding guide with infrastructure overview
- Link to backend/src/common/README.md for detailed usage guide

Key Updates:
- Storage service (LocalAdapter + OSSAdapter)
- Logging system (Winston + JSON format)
- Cache service (Memory + Redis)
- Async job queue (Memory + Database)
- Health check endpoints
- Monitoring metrics
- Database connection pool
- Environment config management

All modules support zero-code switching between local and cloud environments.

Related: #Platform-Infrastructure

docs/03-业务模块/ASL-AI智能文献/README.md

@@ -80,3 +80,4 @@ ASL-AI智能文献/
 
 
 
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docs/03-业务模块/ASL-AI智能文献/[AI对接] ASL快速上下文.md

@@ -319,3 +319,4 @@ A: 降级策略：Nougat → PyMuPDF → 提示用户手动处理
 
 
 
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docs/03-业务模块/ASL-AI智能文献/[AI对接] ASL模块快速上下文.md

@@ -414,3 +414,4 @@ A：✅ T1.1.1 - 在 `backend/prisma/schema.prisma` 中定义4个模型
 
 **🎉 祝开发顺利！从 T1.1.1 开始吧！**
 
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