feat(pkb): Integrate pgvector and create Dify replacement plan

Summary:
- Migrate PostgreSQL to pgvector/pgvector:pg15 Docker image
- Successfully install and verify pgvector 0.8.1 extension
- Create comprehensive Dify-to-pgvector migration plan
- Update PKB module documentation with pgvector status
- Update system documentation with pgvector integration

Key changes:
- docker-compose.yml: Switch to pgvector/pgvector:pg15 image
- Add EkbDocument and EkbChunk data model design
- Design R-C-R-G hybrid retrieval architecture
- Add clinical data JSONB fields (pico, studyDesign, regimen, safety, criteria, endpoints)
- Create detailed 10-day implementation roadmap

Documentation updates:
- PKB module status: pgvector RAG infrastructure ready
- System status: pgvector 0.8.1 integrated
- New: Dify replacement development plan (01-Dify替换为pgvector开发计划.md)
- New: Enterprise medical knowledge base solution V2

Tested: PostgreSQL with pgvector verified, frontend and backend functionality confirmed

docs/03-业务模块/DC-数据清洗整理/04-开发计划/工具C_AI_Few-shot示例库.md

@@ -580,5 +580,6 @@ df['creatinine'] = pd.to_numeric(df['creatinine'], errors='coerce')
 
 
 
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docs/03-业务模块/DC-数据清洗整理/04-开发计划/工具C_Bug修复总结_2025-12-08.md

@@ -418,5 +418,6 @@ npm run dev
 
 
 
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docs/03-业务模块/DC-数据清洗整理/04-开发计划/工具C_Day3开发计划.md

@@ -995,5 +995,6 @@ export const aiController = new AIController();
 
 
 
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docs/03-业务模块/DC-数据清洗整理/04-开发计划/工具C_Day4-5前端开发计划.md

@@ -1329,5 +1329,6 @@ npm install react-markdown
 
 
 
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docs/03-业务模块/DC-数据清洗整理/04-开发计划/工具C_Pivot列顺序优化总结.md

@@ -237,5 +237,6 @@ FMA___基线 | FMA___1个月 | FMA___2个月
 
 
 
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docs/03-业务模块/DC-数据清洗整理/04-开发计划/工具C_方案B实施总结_2025-12-09.md

@@ -395,5 +395,6 @@ formula = "FMA总分（0-100） / 100"
 
 
 
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docs/03-业务模块/DC-数据清洗整理/04-开发计划/工具C_缺失值处理_开发进度_2025-12-10.md

@@ -229,5 +229,6 @@ async handleFillnaMice(request, reply) {
 
 
 
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docs/03-业务模块/DC-数据清洗整理/04-开发计划/工具C_缺失值处理功能_更新说明.md

@@ -201,5 +201,6 @@ method: 'mean' | 'median' | 'mode' | 'constant' | 'ffill' | 'bfill'
 
 
 
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