Add redis methods

main.py

@@ -2218,9 +2218,9 @@ async def fastapi_query_all_scada_records_by_date(querydate: str):
     return result_dict
 
 
-@app.get("/clearredis/")
-async def fastapi_clear_redis():
-    redis_client.flushall()
+@app.post("/clearredis/")
+async def fastapi_clear_redis(key: str):
+    redis_client.delete(key)
     return True
 
 @app.get("/queryredis/")