新增: 知识图谱Phase2事件流(父⑥) — project_events统一事件流+埋点+timeline

父⑥ Phase 2(对标设计 §2.4):
- V30 迁移:project_events 追加型审计表(id/project_id/event_type/entity_type/entity_id/from_state/to_state/context_json/source/conversation_id/created_at)+ 双索引(project,time / entity)
- ProjectEventRecord + ProjectEventRepo(insert 追加型/get_by_project/get_by_entity/list_recent)
- 事件埋点(best-effort,hook/after,失败 warn 不阻断主操作):
  - task.rs emit_event 辅助 + create_task/advance_task/move_task_queue 埋点
  - idea.rs promote_idea 埋点(idea_promoted,project_id=新项目)
  - project.rs create/delete 埋点
  - 注:idea_created 暂不埋点(idea 无 project_id,待 Inbox 项目落地,NOT NULL+FK 约束)
- get_project_timeline IPC(events 模块)+ lib.rs 注册 + AI 工具(基线 +N)
- source 语义:IPC 标 human,AI 工具路径标 ai

注:workflow 脚本中文变量名 const 致验证 agent 未跑,主控独立 cargo check EXIT 0 + grep 落地齐全核验。

src-tauri/src/commands/idea.rs

@@ -9,7 +9,7 @@ use df_ai::provider::LlmProvider;
 use df_types::types::{new_id, Priority};
 use df_ideas::capture::Idea;
 use df_storage::crud::{is_unique_constraint_err, IdeaQuery};
-use df_storage::models::{IdeaEvaluationRecord, IdeaRecord, ProjectRecord};
+use df_storage::models::{IdeaEvaluationRecord, IdeaRecord, ProjectEventRecord, ProjectRecord};
 
 use crate::state::AppState;
 
@@ -104,6 +104,12 @@ pub async fn create_idea(
         .insert(record.clone())
         .await
         .map_err(err_str)?;
+    // 知识图谱 Phase 2(对标设计 §2.4):idea_created 事件**暂不埋点**。
+    // 原因:project_events.project_id 是 NOT NULL + FK(PRAGMA foreign_keys=ON),
+    // 而 idea 无 project_id(立项前不属于任何项目)。设计 §2.5 计划用系统初始化创建的
+    // Inbox 项目作为无主 idea 的归属,但 Inbox 项目尚未实现(独立任务)。
+    // 写 NULL 会违反 NOT NULL,写不存在的 project_id 会违反 FK——两者都会让 best-effort
+    // 退化成「写失败 warn」,无实际价值且噪音。Inbox 项目落地后此处补 idea_created 埋点。
     Ok(record)
 }
 
@@ -201,6 +207,31 @@ pub async fn promote_idea(
         return Err(format!("灵感立项回写失败(已回滚项目创建): {}", e));
     }
 
+    // 知识图谱 Phase 2(对标设计 §2.4 hook/after):idea_promoted 事件。best-effort 不阻断。
+    // 灵感此时已立项为新项目(project_id 存在,FK 满足),事件挂在 project_id 下,
+    // entity 指向 idea,from_state=draft→to_state=promoted。
+    let event = ProjectEventRecord {
+        id: new_id(),
+        project_id: project_id.clone(),
+        event_type: "idea_promoted".to_string(),
+        entity_type: Some("idea".to_string()),
+        entity_id: Some(id.clone()),
+        from_state: Some("draft".to_string()),
+        to_state: Some("promoted".to_string()),
+        context_json: None,
+        source: Some("human".to_string()),
+        conversation_id: None,
+        created_at: now_millis(),
+    };
+    if let Err(e) = state.project_events.insert(event).await {
+        tracing::warn!(
+            idea_id = %id,
+            project_id = %project_id,
+            error = %e,
+            "[事件流] idea_promoted 埋点写入失败(不阻断立项)"
+        );
+    }
+
     Ok(df_ideas::promotion::PromotionResult {
         idea_id: id,
         project_id: project_id,