refactor(trigger): clean up and optimize trigger-related code

- Remove unused classes and imports in encryption utilities
- Simplify method signatures for better readability
- Enhance code quality by adding newlines for clarity
- Update tests to reflect changes in import paths

Co-authored-by: Claude <noreply@anthropic.com>

api/core/helper/provider_cache.py

@@ -80,6 +80,7 @@ class TriggerProviderCredentialCache(ProviderCredentialsCache):
         credential_id = kwargs["credential_id"]
         return f"trigger_credentials:tenant_id:{tenant_id}:provider_id:{provider_id}:credential_id:{credential_id}"
 
+
 class TriggerProviderOAuthClientCache(ProviderCredentialsCache):
     """Cache for trigger provider OAuth client"""
 
@@ -91,6 +92,7 @@ class TriggerProviderOAuthClientCache(ProviderCredentialsCache):
         provider_id = kwargs["provider_id"]
         return f"trigger_oauth_client:tenant_id:{tenant_id}:provider_id:{provider_id}"
 
+
 class NoOpProviderCredentialCache:
     """No-op provider credential cache"""