优化传感器布置算法，修复数据库更新逻辑

app/api/v1/endpoints/simulation.py

@@ -6,7 +6,6 @@ import shutil
 import threading
 from fastapi import APIRouter, HTTPException, File, UploadFile, Query, Path, Body
 from fastapi.responses import PlainTextResponse
-import app.infra.db.influxdb.api as influxdb_api
 import app.services.simulation as simulation
 import app.services.globals as globals
 from app.services.tjnetwork import (
@@ -28,8 +27,7 @@ from app.algorithms.sensor import (
     pressure_sensor_placement_sensitivity,
     pressure_sensor_placement_kmeans,
 )
-import app.algorithms.cleaning.flow as flow_data_clean
-import app.algorithms.cleaning.pressure as pressure_data_clean
+
 from app.services.network_import import network_update
 from app.services.simulation_ops import (
     project_management,