feat: dedup expected data by handover_no before export submit

- store.get_existing_handover_nos: query PG expected_record.handover_no

- inject dedup skip before submitting export in zto/yunda/anneng/shunxin

- shunxin reads RTS handover_no from waybill-list view (method 1)

- force-redownload switch threaded via task_spec -> dispatch -> impl

- schema: add idx_expected_handover index

Co-Authored-By: Claude <noreply@anthropic.com>

inbound_verify/cli/server.py

@@ -187,6 +187,9 @@ app = FastAPI(title="InboundVerify 服务端", lifespan=lifespan)
 class TaskRequest(BaseModel):
     site: str
     kind: str
+    force: bool = (
+        False  # 强制重下：忽略已落库去重，重新提交所有班次/交接单的导出任务（默认关）
+    )
 
 
 @app.post("/tasks")
@@ -200,7 +203,7 @@ def create_task(req: TaskRequest):
     if (req.site, req.kind) not in TASK_HANDLERS:
         raise HTTPException(status_code=400, detail=f"无效任务: {req.site}/{req.kind}")
     task_id = state_store.create_task(req.site, req.kind)
-    task_queue.put((task_id, {"site": req.site, "kind": req.kind}))
+    task_queue.put((task_id, {"site": req.site, "kind": req.kind, "force": req.force}))
     return {"task_id": task_id}