feat(ai): 集成知识库到 AnalysisService — system_prompt 自动注入临床规则

Phase 3 Task 23: AnalysisService 新增可选 knowledge_source，
stream_analyze 前自动查询 L1/L2/L3 知识并注入 system_prompt

crates/erp-server/src/main.rs

@@ -519,12 +519,13 @@ async fn main() -> anyhow::Result<()> {
             default_claude = default_claude.with_base_url(base_url.clone());
         }
 
-        let analysis = std::sync::Arc::new(
-            erp_ai::service::analysis::AnalysisService::new(
-                Box::new(default_claude),
-                db.clone(),
-            ),
-        );
+        let analysis_svc = erp_ai::service::analysis::AnalysisService::new(
+            Box::new(default_claude),
+            db.clone(),
+        ).with_knowledge_source(std::sync::Arc::new(
+            erp_ai::knowledge::structured_source::StructuredKnowledgeSource::new(db.clone()),
+        ));
+        let analysis = std::sync::Arc::new(analysis_svc);
         let prompt = std::sync::Arc::new(erp_ai::service::prompt::PromptService::new(db.clone()));
         let usage = std::sync::Arc::new(erp_ai::service::usage::UsageService::new(db.clone()));
         let suggestion = std::sync::Arc::new(erp_ai::service::suggestion::SuggestionService);