GRAYLOG - Chapter 5, Exercise 1 Solution
==========================================================
Finding POST Requests to integrations-api

PROBLEM
-------
Write a query, using this chapter's own real field, that finds every
POST request to the integrations-api service.

SOLUTION
--------
This chapter's own field table lists requestMethod as the field holding
the HTTP method. Combining it with the service field (Chapter 2) using
AND:

    service:integrations-api AND requestMethod:POST

ANSWER: service:integrations-api AND requestMethod:POST

----
WHY THIS WORKS AS AN ANSWER

This directly combines this chapter's own requestMethod field with
Chapter 2's own service field, using the same AND-combination pattern
established since Chapter 1. Since integrations-api is one of the five
real services this chapter identified as using the shared HTTP/Koa/
Express field shape, requestMethod is a genuinely valid field to query
against it.