feat(asl): Implement full-text screening core LLM service and validation system (Day 1-3)

Core Components:
- PDFStorageService with Dify/OSS adapters
- LLM12FieldsService with Nougat-first + dual-model + 3-layer JSON parsing
- PromptBuilder for dynamic prompt assembly
- MedicalLogicValidator with 5 rules + fault tolerance
- EvidenceChainValidator for citation integrity
- ConflictDetectionService for dual-model comparison

Prompt Engineering:
- System Prompt (6601 chars, Section-Aware strategy)
- User Prompt template (PICOS context injection)
- JSON Schema (12 fields constraints)
- Cochrane standards (not loaded in MVP)

Key Innovations:
- 3-layer JSON parsing (JSON.parse + json-repair + code block extraction)
- Promise.allSettled for dual-model fault tolerance
- safeGetFieldValue for robust field extraction
- Mixed CN/EN token calculation

Integration Tests:
- integration-test.ts (full test)
- quick-test.ts (quick test)
- cached-result-test.ts (fault tolerance test)

Documentation Updates:
- Development record (Day 2-3 summary)
- Quality assurance strategy (full-text screening)
- Development plan (progress update)
- Module status (v1.1 update)
- Technical debt (10 new items)

Test Results:
- JSON parsing success rate: 100%
- Medical logic validation: 5/5 passed
- Dual-model parallel processing: OK
- Cost per PDF: CNY 0.10

Files: 238 changed, 14383 insertions(+), 32 deletions(-)
Docs: docs/03-涓氬姟妯″潡/ASL-AI鏅鸿兘鏂囩尞/05-寮€鍙戣褰?2025-11-22_Day2-Day3_LLM鏈嶅姟涓庨獙璇佺郴缁熷紑鍙?md

backend/src/common/README.md

@@ -413,3 +413,4 @@ npm run dev
 
 
 
+

backend/src/common/cache/CacheAdapter.ts

@@ -82,3 +82,4 @@ export interface CacheAdapter {
 
 
 
+

backend/src/common/cache/CacheFactory.ts

@@ -105,3 +105,4 @@ export class CacheFactory {
 
 
 
+

backend/src/common/cache/index.ts

@@ -57,3 +57,4 @@ export const cache = CacheFactory.getInstance()
 
 
 
+

backend/src/common/document/ExtractionClient.ts

@@ -262,7 +262,8 @@ class ExtractionClient {
   }
 }
 
-// 导出单例
+// 导出类和单例
+export { ExtractionClient };
 export const extractionClient = new ExtractionClient();
 
 

backend/src/common/health/index.ts

@@ -32,3 +32,4 @@ export type { HealthCheckResponse } from './healthCheck.js'
 
 
 
+

backend/src/common/jobs/JobFactory.ts

@@ -88,3 +88,4 @@ export class JobFactory {
 
 
 
+

backend/src/common/jobs/types.ts

@@ -95,3 +95,4 @@ export interface JobQueue {
 
 
 
+

backend/src/common/llm/adapters/ClaudeAdapter.ts

@@ -46,3 +46,4 @@ export class ClaudeAdapter extends CloseAIAdapter {
 
 
 
+

backend/src/common/logging/index.ts

@@ -43,3 +43,4 @@ export { default } from './logger.js'
 
 
 
+

backend/src/common/monitoring/index.ts

@@ -46,3 +46,4 @@ export { Metrics, requestTimingHook, responseTimingHook } from './metrics.js'
 
 
 
+

backend/src/common/storage/StorageAdapter.ts

@@ -72,3 +72,4 @@ export interface StorageAdapter {
 
 
 
+