OpenAI Docs are out of date for event-match operations

[varCepheid]

The documentation in /internal/server/openai.yaml says that the allowed operations on matches are GET to /matches/{matchKey} and POST to /matches. The request-handler in router.go, however, can handle GET and PUT to /matches/{matchKey} but not any POSTs. The frontend currently uses the GET and the PUT but not the POST. The documentation should be updated to reflect the usage and the capabilities.