ProcessWire and PDO: Ensuring Write Idempotency During Retry Logic

When integrating external API triggers with ProcessWire page updates, there is a risk of duplicate data entries if a network timeout occurs after a write operation but before the confirmation is received. While ProcessWire utilizes PDO for database interactions, the framework does not natively provide idempotency keys or a built-in mechanism to deduplicate repeated write requests at the core level.

The primary concern involves the interaction between database transactions and the ProcessWire hook system. A retry attempt that triggers a page save may re-execute Pages::saved or Page::saved hooks, potentially duplicating non-transactional side effects such as external notifications or log entries.

Given that atomicity depends on the underlying storage engine (e.g., InnoDB vs MyISAM), how can a developer implement a retry strategy that ensures a page is updated exactly once without triggering redundant hook logic? What is the recommended approach for tracking request uniqueness within the ProcessWire API to prevent these duplicate writes?