4.6.2
(fix): Fix Java SDK generation crash when an OpenAPI property name is a Java keyword
or literal (e.g. true, false, null, if, new). KeyWordUtils only
sanitized 12 of Java’s reserved words, so JavaPoet rejected the rest with
IllegalArgumentException: not a valid name. The reserved-word set now covers
the full Java keyword list plus true/false/null literals, so these
properties generate as _<name> fields with @JsonProperty("<name>")
preserving the wire format.
