Implement bulk operations

[rauann]

Summary

Implement bulk insert, update, and delete operations using DynamoDB's batch APIs.

Context

Currently, each create/update/delete operation is performed individually. Bulk operations would significantly improve performance when working with multiple items.

Implementation Notes

• Use BatchWriteItem for bulk puts and deletes (up to 25 items per request)
• Use BatchGetItem for bulk reads (up to 100 items per request)
• Handle unprocessed items and implement retry logic
• Consider implementing TransactWriteItems for atomic bulk operations (up to 100 items)
• Need to handle the 16MB request size limit

References

• DynamoDB BatchWriteItem
• DynamoDB BatchGetItem