Azure Function App which runs periodically to aggregate the bytes read per IP address over a window of time

[elayrocks]

Description

This PR is the first step in implementing data consumption quotas for SAS API Token Issuance. I created a new Azure Function App which runs periodically to execute a KQL query against Storage Account Blob Logs to aggregate the bytes read per IP address over a window of time (e.g., 24 hours). IPs which have read above a certain threshold will be added to an Azure storage table called blob storage banned ip which serves as a temporary ban list.

Please refer to the design doc for more details.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Unit test uses mocked response from log query client and writes test data to azurite. The integration/E2E test queries the log analytics workspace and writes to test table in storage account and deletes it after testing is complete.

Make sure correct roles have been assigned, run ./scripts/server to start azurite service and scripts/test --funcs [--no-integration] to run unit tests. and integration tests (optionally).

Checklist:

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• I have performed a self-review
• Changelog has been updated
• Documentation has been updated
• Unit tests pass locally (./scripts/test)
• Code is linted and styled (./scripts/format)