feat: initialize Nuanji (Warm Notes) project

- Base platform from base.git (ERP base: auth, core, config, message, workflow, plugin)
- Created erp-diary module skeleton (lib.rs, dto.rs, error.rs, event.rs, state.rs)
- Integrated erp-diary into workspace and erp-server
- Added DiaryModule registration in main.rs
- Added DiaryState FromRef in state.rs
- Diary routes mounted (empty routes, ready for implementation)
- Product design spec v1.2 preserved in docs/
- Implementation plan preserved in plans/

Cargo check: OK
Cargo test: OK (78+ base tests passing)

crates/erp-core/src/entity/audit_log.rs

@@ -0,0 +1,29 @@
+use sea_orm::entity::prelude::*;
+use serde::{Deserialize, Serialize};
+
+/// 审计日志实体 — 映射 audit_logs 表。
+#[derive(Clone, Debug, PartialEq, DeriveEntityModel, Serialize, Deserialize)]
+#[sea_orm(table_name = "audit_logs")]
+pub struct Model {
+    #[sea_orm(primary_key, auto_increment = false)]
+    pub id: Uuid,
+    pub tenant_id: Uuid,
+    pub user_id: Option<Uuid>,
+    pub action: String,
+    pub resource_type: String,
+    pub resource_id: Option<Uuid>,
+    pub old_value: Option<serde_json::Value>,
+    pub new_value: Option<serde_json::Value>,
+    pub ip_address: Option<String>,
+    pub user_agent: Option<String>,
+    pub created_at: DateTimeUtc,
+    /// 哈希链 — 前一条记录的 record_hash
+    pub prev_hash: Option<String>,
+    /// 当前记录的哈希 SHA256(id + action + resource_type + resource_id + created_at + prev_hash)
+    pub record_hash: Option<String>,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {}
+
+impl ActiveModelBehavior for ActiveModel {}

crates/erp-core/src/entity/dead_letter_event.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 = "dead_letter_events")]
+pub struct Model {
+    #[sea_orm(primary_key, auto_increment = false)]
+    pub id: Uuid,
+    #[sea_orm(skip_serializing_if = "Option::is_none")]
+    pub tenant_id: Option<Uuid>,
+    pub original_event_id: Uuid,
+    pub event_type: String,
+    #[sea_orm(skip_serializing_if = "Option::is_none")]
+    pub payload: Option<serde_json::Value>,
+    pub consumer_id: String,
+    pub attempts: i32,
+    #[sea_orm(skip_serializing_if = "Option::is_none")]
+    pub last_error: Option<String>,
+    pub created_at: DateTimeUtc,
+    #[sea_orm(skip_serializing_if = "Option::is_none")]
+    pub resolved_at: Option<DateTimeUtc>,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {}
+
+impl ActiveModelBehavior for ActiveModel {}

crates/erp-core/src/entity/domain_event.rs

@@ -0,0 +1,24 @@
+use sea_orm::entity::prelude::*;
+use serde::{Deserialize, Serialize};
+
+/// 领域事件实体 — 映射 domain_events 表。
+#[derive(Clone, Debug, PartialEq, DeriveEntityModel, Serialize, Deserialize)]
+#[sea_orm(table_name = "domain_events")]
+pub struct Model {
+    #[sea_orm(primary_key, auto_increment = false)]
+    pub id: Uuid,
+    pub tenant_id: Uuid,
+    pub event_type: String,
+    pub payload: Option<serde_json::Value>,
+    pub correlation_id: Option<Uuid>,
+    pub status: String,
+    pub attempts: i32,
+    pub last_error: Option<String>,
+    pub created_at: DateTimeUtc,
+    pub published_at: Option<DateTimeUtc>,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {}
+
+impl ActiveModelBehavior for ActiveModel {}

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

@@ -0,0 +1,4 @@
+pub mod audit_log;
+pub mod dead_letter_event;
+pub mod domain_event;
+pub mod processed_event;

crates/erp-core/src/entity/processed_event.rs

@@ -0,0 +1,18 @@
+use sea_orm::entity::prelude::*;
+use serde::{Deserialize, Serialize};
+
+/// 已处理事件记录 — 幂等性去重表。
+#[derive(Clone, Debug, PartialEq, DeriveEntityModel, Serialize, Deserialize)]
+#[sea_orm(table_name = "processed_events")]
+pub struct Model {
+    #[sea_orm(primary_key, auto_increment = false)]
+    pub event_id: Uuid,
+    #[sea_orm(primary_key, auto_increment = false)]
+    pub consumer_id: String,
+    pub processed_at: DateTimeUtc,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {}
+
+impl ActiveModelBehavior for ActiveModel {}