refactor(api): update subscription handling in trigger provider

- Replaced SubscriptionSchema with SubscriptionConstructor in various parts of the trigger provider implementation to streamline subscription management.
- Enhanced the PluginTriggerProviderController to utilize the new subscription constructor for retrieving default properties and credential schemas.
- Removed the deprecated get_provider_subscription_schema method from TriggerManager.
- Updated TriggerSubscriptionBuilderService to reflect changes in subscription handling, ensuring compatibility with the new structure.

These changes improve the clarity and maintainability of the subscription handling within the trigger provider architecture.

api/services/trigger/trigger_subscription_builder_service.py

@@ -152,7 +152,7 @@ class TriggerSubscriptionBuilderService:
         if not provider_controller:
             raise ValueError(f"Provider {provider_id} not found")
 
-        subscription_schema = provider_controller.get_subscription_schema()
+        subscription_constructor = provider_controller.get_subscription_constructor()
         subscription_id = str(uuid.uuid4())
         subscription_builder = SubscriptionBuilder(
             id=subscription_id,
@@ -161,8 +161,8 @@ class TriggerSubscriptionBuilderService:
             tenant_id=tenant_id,
             user_id=user_id,
             provider_id=str(provider_id),
-            parameters=subscription_schema.get_default_parameters(),
-            properties=subscription_schema.get_default_properties(),
+            parameters=subscription_constructor.get_default_parameters() if subscription_constructor else {},
+            properties=provider_controller.get_subscription_default_properties(),
             credentials={},
             credential_type=credential_type,
             credential_expires_at=-1,