[Hubs] Fail ingestion when older than the retention period

[flanakin]

📝 Scenario

As a FinOps hub admin, I need to fail data ingestion when a month that is older than the data retention period is attempted to be ingested in order to clarify why ingested data is not available

💎 Solution

In the ingestion_ExecuteETL pipeline, check if the ingested month is older than the final data retention. If older, then fail the pipeline run with a clear error that states the data is older than the data retention and add documentation to indicate that they need to update the final retention period.

📋 Tasks

Required tasks

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1. Update ingestion_ExecuteETL to fail if ingested data is older than configured retention
2. Document the error code and how to resolve it
3. Document the scenario in the troubleshooting guide

Stretch goals

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1. TODO: Add tasks

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