[DEV-15434] Added check for Recipient Count View

[DavidMikolaKC]

Description:

The RecipientCount view from list_recipients.py only reads data from the API request’s body before caching, however the cache.py helper accepts parameters from the request body and the query parameters. This means that someone can send an API request to the RecipientCount endpoint with a query parameter, but no request body, causing an unfiltered search to be done and cached. The problem is that even though the result was completely unfiltered, it would be cached with the query parameter causing future requests (with the same filter in the body instead of query parameters) to be returned incorrectly.

Technical Details:

The Recipient Count View only reads the request body. The cache function has been updated as to not take into account the query parameters for that view.

Requirements for PR Merge:

1. Unit & integration tests updated
2. API documentation updated (examples listed below)
   1. API Contracts
   2. API UI
   3. Comments
3. Data validation completed (examples listed below)
   1. Does this work well with the current frontend? Or is the frontend aware of a needed change?
   2. Is performance impacted in the changes (e.g., API, pipeline, downloads, etc.)?
   3. Is the expected data returned with the expected format?
4. Appropriate Operations ticket(s) created
5. Jira Ticket(s)
   1. DEV-15434

Explain N/A in above checklist:

Accidentally approved before my review was complete.