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modules/postgres-etl/README.md

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 #### SQS Integration for ETL process
 
 The SQS queues are used to watch the S3 bucket in the Extract environment. We only need it in the `extract` module. The main queue `postgres-etl-s3` receives messages about the data extraction events and a dead-letter queue `postgres-etl-s3-dlq` handles messages that cannot be processed successfully.