Play Framework

fix: treat JSON-library tree types as opaque object schemas (PF-102)

After PF-98 added getter reflection, beans with JsonElement / JsonNode /
JSONObject fields started recursing into the library's API surface
(asString, isJsonArray, etc.) and registering ~5 noise schemas in
components/schemas per field reference. Drops five entries from JClaw's
spec in the ChannelView case alone.

Short-circuit early in classSchema(): if cls is com.google.gson.JsonElement
(or one of its four subclasses), or extends com.fasterxml.jackson.databind
.JsonNode (superclass walk catches ObjectNode/ArrayNode/etc.), or is
org.json.JSONObject / JSONArray, return a plain ObjectSchema with no
recursion.

Detection is by fully-qualified class name (and superclass-chain walk for
Jackson), so neither Jackson nor json.org becomes a framework compile-time
dep. Gson is already a runtime dep so the predicate evaluates lazily.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>