feat(ai): Phase 3A RAG 知识库 — CRUD API + Agent Tool + 向量知识源 + 前端管理页

- 知识库 REST API: 10 个端点 (references/guides CRUD + re-embed)
- search_medical_knowledge Agent Tool: 语义检索参考资料和临床指南
- VectorKnowledgeSource: 实现 KnowledgeSource trait，自动降级
- 沙箱配置: Patient/MedicalStaff 允许使用知识库检索
- 前端 AiKnowledgePage: Tabs(参考资料/临床指南) + Table + Modal CRUD
- 权限码 seed 迁移: ai.knowledge.list + ai.knowledge.manage + 菜单

crates/erp-ai/src/service/knowledge.rs

@@ -10,7 +10,7 @@ use crate::service::embedding::{EmbeddingService, format_vector};
 
 // ─── DTO ───
 
-#[derive(Debug, Deserialize, Serialize)]
+#[derive(Debug, Deserialize, Serialize, utoipa::ToSchema)]
 pub struct CreateKnowledgeReferenceReq {
     pub title: String,
     pub analysis_type: String,
@@ -20,7 +20,7 @@ pub struct CreateKnowledgeReferenceReq {
     pub is_enabled: Option<bool>,
 }
 
-#[derive(Debug, Deserialize, Serialize)]
+#[derive(Debug, Deserialize, Serialize, utoipa::ToSchema)]
 pub struct UpdateKnowledgeReferenceReq {
     pub title: Option<String>,
     pub analysis_type: Option<String>,
@@ -30,7 +30,7 @@ pub struct UpdateKnowledgeReferenceReq {
     pub is_enabled: Option<bool>,
 }
 
-#[derive(Debug, Deserialize, Serialize)]
+#[derive(Debug, Deserialize, Serialize, utoipa::ToSchema)]
 pub struct CreateKnowledgeGuideReq {
     pub title: String,
     pub analysis_type: String,
@@ -39,7 +39,7 @@ pub struct CreateKnowledgeGuideReq {
     pub is_enabled: Option<bool>,
 }
 
-#[derive(Debug, Deserialize, Serialize)]
+#[derive(Debug, Deserialize, Serialize, utoipa::ToSchema)]
 pub struct UpdateKnowledgeGuideReq {
     pub title: Option<String>,
     pub analysis_type: Option<String>,