feat(tasks): adopt canonical task statuses

api/routers/tasks.py

@@ -11,6 +11,7 @@ from api.models.token_event import TokenEvent
 from api.models.workstream import Workstream
 from api.schemas.task import TaskCreate, TaskRead, TaskUpdate
 from api.services.lifecycle import status_value, transition_task_status
+from api.task_status import normalize_task_status
 
 router = APIRouter(prefix="/tasks", tags=["tasks"])
 
@@ -18,7 +19,7 @@ router = APIRouter(prefix="/tasks", tags=["tasks"])
 @router.get("/", response_model=list[TaskRead])
 async def list_tasks(
     workstream_id: uuid.UUID | None = None,
-    status: TaskStatus | None = None,
+    status: str | None = None,
     assignee: str | None = None,
     needs_human: bool | None = Query(None),
     priority: str | None = None,
@@ -29,7 +30,7 @@ async def list_tasks(
     if workstream_id:
         q = q.where(Task.workstream_id == workstream_id)
     if status:
-        q = q.where(Task.status == status)
+        q = q.where(Task.status == TaskStatus(normalize_task_status(status)))
     if assignee:
         q = q.where(Task.assignee == assignee)
     if needs_human is not None:
@@ -50,7 +51,7 @@ async def create_task(
 ) -> Task:
     task = Task(**body.model_dump())
     session.add(task)
-    if status_value(task.status) == "in_progress":
+    if status_value(task.status) == "progress":
         ws = await session.get(Workstream, task.workstream_id)
         transition_task_status(
             task,
@@ -198,7 +199,7 @@ async def cancel_task(
     task = await session.get(Task, task_id)
     if task is None:
         raise HTTPException(status_code=404, detail="Task not found")
-    transition_task_status(task, TaskStatus.cancelled)
+    transition_task_status(task, TaskStatus.cancel)
     await session.commit()
     await session.refresh(task)
     return task