4.2.0-rc.1

(chore): Bump IR dependency to v66.1.0 Maven artifact, replacing custom deserializer workarounds with native irV66 types.

(feat): Support default discriminant values on unions. When a discriminated union variant has a default value on its discriminator field, the Java SDK now falls back to that variant instead of treating missing discriminators as unknown. This fixes deserialization of payloads where the discriminator is omitted and the API expects a default variant.

4.1.4

(chore): Update Node.js from 24.13.0 to 24.14.1 in the generator Docker image to fix 7 CVEs (CVE-2026-21710, CVE-2026-21717, CVE-2026-21713, CVE-2026-21714, CVE-2026-21712, CVE-2026-21715, CVE-2026-21716).