Three changes for v2.1.2:
1. bootstrap-xiapan now writes "agents.defaults.model.primary/fallbacks"
(uclaw-cloud/deepseek-v4-flash + 3 fallbacks) and an empty models[],
matching the ClawX commercial schema. Lets OpenClaw runtime auto-discover
models from /v1/models instead of hard-coding a list that drifts.
2. config-server tries ports 18788..18798 with EADDRINUSE fallback and
persists the live port to data/.openclaw/runtime.json so future tooling
can discover it. Fixes silent failure when a second portable instance
started while 18788 was occupied.
3. u-claw-app/package.json version 2.0.0 -> 2.1.2 so .exe/.dmg filenames
align with the release tag.
cc2984234b