Scala Common Enrich: support POST requests in API Request enrichment

Currently the API request enrichment only supports GET requests where each of the inputs is either added as part of the URL path or alternatively as part of the query parameters.

Supporting POST would make it possible to reliably send significantly larger payloads that may either involve a large number of inputs or a smaller number of inputs but with a large amount of text (e.g., encrypted data, large arrays etc).

[aparra]

@alexanderdean Yes, currently it is 1.

				"cache": {
					"type": "object",
					"properties": {
						"size": {
							"type": "integer",
							"minimum": 1
						},
						"ttl": {
							"type": "integer",
							"minimum": 0,
							"maximum": 86400
						}
					},
					"additionalProperties": false,
					"required": ["size", "ttl"]
				}

I think in this case, we need only create a new version of JSON Schema when "size": { "type": "integer", "minimum": 0 }.

Current implementation of cache supports size = 0:

val cache = Cache(size = 0, ttl = 0)
val key   = ApiRequestEnrichment.cacheKey(url = "http://api.acme.com/url", body = None)

cache.put(key, JInt(42).success)
cache.get(key) must beNone and (cache.actualLoad must beEqualTo(0))

[miike]

Agreed - it isn’t semantically ideal from a REST point of view but could also make it quite a bit easier to support POST queries to GraphQL APIs.