Add rate_limits_hit to QueryStats type

[ptpaterson]

FE-6078

Description

Update the QueryStats type to include the rate_limits_hit field, which is included in the response of throttling errors.

Motivation and context

There is no issue with JavaScript populating stats with the rate_limits_hit response, but it is inaccessible to TypeScript users relying on our types.

How was the change tested?

I extended a test that ensures the stats are propagated to query responses. Existing tests ensure that stats go to the right place for ServiceErrors. There are no existing integration tests that demonstrate stats actually come from the database, and none were added.

Here are some screenshots of me triggering rate limiting with the raw responses

Read limit

Write limit

Compute limit

rate_limits_hit is returned as an empty array on successful queries

Change types

• • Bug fix (non-breaking change that fixes an issue)
• • New feature (non-breaking change that adds functionality)
• • Breaking change (backwards-incompatible fix or feature)

Checklist:

• • My code follows the code style of this project.
• • My change requires a change to Fauna documentation.
    • rate_limits_hit is already noted in the HTTP API docs.
• • My change requires a change to the README, and I have updated it accordingly.

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