fix: connect API to tracker.db via SQLite repository

apps/api/app/api/routes/project_management.py

@@ -5,10 +5,10 @@ from typing import Annotated
 from fastapi import APIRouter, Depends, HTTPException
 from pydantic import BaseModel, Field
 
-from packages.adapters.in_memory.project_management_repositories import (
-    InMemoryMilestoneRepository,
-    InMemoryTaskIssueRepository,
-    InMemoryTaskRepository,
+from packages.adapters.sqlite_tracker.project_management_repositories import (
+    SQLiteMilestoneRepository,
+    SQLiteTaskIssueRepository,
+    SQLiteTaskRepository,
 )
 from packages.application.get_task_detail_use_case import GetTaskDetailUseCase
 from packages.application.update_task_use_case import UpdateTaskUseCase
@@ -27,10 +27,10 @@ from packages.domain import TaskPriority, TaskStatus
 
 router = APIRouter()
 
-# 简易依赖注入（生产环境应走数据库）
-_task_repo = InMemoryTaskRepository()
-_milestone_repo = InMemoryMilestoneRepository()
-_issue_repo = InMemoryTaskIssueRepository()
+# 使用 SQLite tracker.db
+_task_repo = SQLiteTaskRepository()
+_milestone_repo = SQLiteMilestoneRepository()
+_issue_repo = SQLiteTaskIssueRepository()
 
 
 def get_task_repo():