feat(trigger): enhance trigger event handling and introduce new debug event polling

- Refactored the `DraftWorkflowTriggerNodeApi` and related services to utilize the new `TriggerService` for polling debug events, improving modularity and clarity.
- Added `poll_debug_event` methods in `TriggerService`, `ScheduleService`, and `WebhookService` to streamline event handling for different trigger types.
- Introduced `ScheduleDebugEvent` and updated `PluginTriggerDebugEvent` to include a more structured approach for event data.
- Enhanced the `invoke_trigger_event` method to improve error handling and data validation during trigger invocations.
- Updated frontend API calls to align with the new event structure, removing deprecated parameters for cleaner integration.

api/services/trigger/trigger_provider_service.py

@@ -192,9 +192,7 @@ class TriggerProviderService:
             raise ValueError(str(e))
 
     @classmethod
-    def get_subscription_by_id(
-        cls, tenant_id: str, subscription_id: str | None = None
-    ) -> TriggerProviderSubscriptionApiEntity | None:
+    def get_subscription_by_id(cls, tenant_id: str, subscription_id: str | None = None) -> TriggerSubscription | None:
         """
         Get a trigger subscription by the ID.
         """
@@ -216,7 +214,13 @@ class TriggerProviderService:
                     subscription=subscription,
                 )
                 subscription.credentials = encrypter.decrypt(subscription.credentials)
-                return subscription.to_api_entity()
+                properties_encrypter, _ = create_trigger_provider_encrypter_for_properties(
+                    tenant_id=subscription.tenant_id,
+                    controller=provider_controller,
+                    subscription=subscription,
+                )
+                subscription.properties = properties_encrypter.decrypt(subscription.properties)
+                return subscription
             return None
 
     @classmethod