Update import paths and add trigger_cron task

- Changed import path for TriggerGraphRequestModel and TriggerGraphResponseModel to reflect new model structure.
- Introduced a new file for trigger_cron task to manage scheduled trigger executions.

Author: NiveditJain

state-manager/app/controller/trigger_graph.py

@@ -1,7 +1,7 @@
 from fastapi import HTTPException
 
 from app.singletons.logs_manager import LogsManager
-from app.models.trigger_model import TriggerGraphRequestModel, TriggerGraphResponseModel
+from app.models.trigger_graph_model import TriggerGraphRequestModel, TriggerGraphResponseModel
 from app.models.state_status_enum import StateStatusEnum
 from app.models.db.state import State
 from app.models.db.store import Store