changed MinerFactory to a singleton class to ensure clearing its cache is easier and removed creation of independant miner factories for each utility

tools/web_monitor/dashboard/func.py

@@ -1,6 +1,6 @@
 import asyncio
 
-from tools.web_monitor.miner_factory import miner_factory
+from miners.miner_factory import MinerFactory
 from tools.web_monitor._settings.func import get_current_settings
 
 
@@ -11,7 +11,7 @@ async def get_miner_data_dashboard(miner_ip):
         miner_data_timeout = settings["miner_data_timeout"]
 
         miner_ip = await asyncio.wait_for(
-            miner_factory.get_miner(miner_ip),
+            MinerFactory().get_miner(miner_ip),
             miner_identify_timeout
         )