feat: add check order receipt endpoint

[pavelbrm]

Summary

This PR adds a new endpoint for checking if a receipt is valid, if there is an order for it, and if the order matches the given order id.

The endpoint is defined as follows:

• It requires authentication (similar to set-trial);
• PATCH at /v1/orders/{orderID}/receipt;
  • POST is reserved for moving submit-receipt here later on;
• Success:
  • 200 OK with an empty body ({})
• Failures:
  • various 400 Bad Request responses for validation errors;
  • 404 Not Found when the order was not found by the external ID;
  • Special 424 Failed Dependency when the supplied order id is different from the order found by the receipt;
    • 403 is not appropriate for this endpoint because it's authenticated, and this code might be needed in the future;
  • 500 Internal Server Error for the unclassified failures.

Type of Change

• Product feature
• Bug fix
• Performance improvement
• Refactor
• Other

Tested Environments

• Development
• Staging
• Production

Before Requesting Review

• Does your code build cleanly without any errors or warnings?
• Have you used auto closing keywords?
• Have you added tests for new functionality?
• Have validated query efficiency for new database queries?
• Have documented new functionality in README or in comments?
• Have you squashed all intermediate commits?
• Is there a clear title that explains what the PR does?
• Have you used intuitive function, variable and other naming?
• Have you requested security and/or privacy review if needed
• Have you performed a self review of this PR?

Manual Test Plan

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