feat(ai+db): 知识库 3 表迁移 + Entity — rules/references/guides

Phase 3 Task 21:
- ai_knowledge_rules: L1 规则表（条件表达式 + 动作文本）
- ai_knowledge_references: L2 参考表（摘要 + pgvector 嵌入）
- ai_knowledge_guides: L3 指南表（全文 + pgvector 嵌入）

crates/erp-ai/src/entity/ai_knowledge_guides.rs

@@ -0,0 +1,29 @@
+use sea_orm::entity::prelude::*;
+use serde::{Deserialize, Serialize};
+
+#[derive(Clone, Debug, PartialEq, DeriveEntityModel, Serialize, Deserialize)]
+#[sea_orm(table_name = "ai_knowledge_guides")]
+pub struct Model {
+    #[sea_orm(primary_key, auto_increment = false)]
+    pub id: Uuid,
+    pub tenant_id: Uuid,
+    pub title: String,
+    pub analysis_type: String,
+    pub content: String,
+    pub category: Option<String>,
+    // pgvector 字段 — SeaORM 不原生支持 vector 类型，查询时用 raw SQL
+    #[sea_orm(ignore)]
+    pub embedding: Option<Vec<f32>>,
+    pub is_enabled: bool,
+    pub created_at: DateTimeUtc,
+    pub updated_at: DateTimeUtc,
+    pub created_by: Option<Uuid>,
+    pub updated_by: Option<Uuid>,
+    pub deleted_at: Option<DateTimeUtc>,
+    pub version_lock: i32,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {}
+
+impl ActiveModelBehavior for ActiveModel {}

crates/erp-ai/src/entity/ai_knowledge_references.rs

@@ -0,0 +1,30 @@
+use sea_orm::entity::prelude::*;
+use serde::{Deserialize, Serialize};
+
+#[derive(Clone, Debug, PartialEq, DeriveEntityModel, Serialize, Deserialize)]
+#[sea_orm(table_name = "ai_knowledge_references")]
+pub struct Model {
+    #[sea_orm(primary_key, auto_increment = false)]
+    pub id: Uuid,
+    pub tenant_id: Uuid,
+    pub title: String,
+    pub analysis_type: String,
+    pub source_name: String,
+    pub content_summary: String,
+    // pgvector 字段 — SeaORM 不原生支持 vector 类型，查询时用 raw SQL
+    #[sea_orm(ignore)]
+    pub embedding: Option<Vec<f32>>,
+    pub tags: Option<serde_json::Value>,
+    pub is_enabled: bool,
+    pub created_at: DateTimeUtc,
+    pub updated_at: DateTimeUtc,
+    pub created_by: Option<Uuid>,
+    pub updated_by: Option<Uuid>,
+    pub deleted_at: Option<DateTimeUtc>,
+    pub version_lock: i32,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {}
+
+impl ActiveModelBehavior for ActiveModel {}

crates/erp-ai/src/entity/ai_knowledge_rules.rs

@@ -0,0 +1,27 @@
+use sea_orm::entity::prelude::*;
+use serde::{Deserialize, Serialize};
+
+#[derive(Clone, Debug, PartialEq, DeriveEntityModel, Serialize, Deserialize)]
+#[sea_orm(table_name = "ai_knowledge_rules")]
+pub struct Model {
+    #[sea_orm(primary_key, auto_increment = false)]
+    pub id: Uuid,
+    pub tenant_id: Uuid,
+    pub rule_name: String,
+    pub analysis_type: String,
+    pub condition_expr: String,
+    pub action_text: String,
+    pub priority: i32,
+    pub is_enabled: bool,
+    pub created_at: DateTimeUtc,
+    pub updated_at: DateTimeUtc,
+    pub created_by: Option<Uuid>,
+    pub updated_by: Option<Uuid>,
+    pub deleted_at: Option<DateTimeUtc>,
+    pub version_lock: i32,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {}
+
+impl ActiveModelBehavior for ActiveModel {}

crates/erp-ai/src/entity/mod.rs

@@ -1,5 +1,8 @@
 pub mod ai_analysis;
 pub mod ai_analysis_queue;
+pub mod ai_knowledge_guides;
+pub mod ai_knowledge_references;
+pub mod ai_knowledge_rules;
 pub mod ai_prompt;
 pub mod ai_risk_threshold;
 pub mod ai_suggestion;