The initial pass referenced zxp-sign-cmd@0.2.2 which never shipped (latest
is 2.0.0) and used the v1.x callback API. v2 is promise-based — rewrote
build-zxp.mjs accordingly.
Also commits the freshly-generated self-signed cert + passphrase from the
first local build run. From now on every build reuses these so Adobe's
ZXP signature-continuity rule is satisfied across versions.
Verified end-to-end: `npm install && node build-zxp.mjs` produces
dist/dragonflight-premiere-panel-1.0.0.zxp (34.7 KB), signature verifies,
cert valid until 2051.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
