chore(release): v3.11.0 — models.json SPOT + OpenClaw auto-sync (#32)

- Bumps version 3.10.0 → 3.11.0.
- Adds CHANGELOG.md with v3.11.0 entry.

Rolls up PR #30 (refactor: models.json SPOT) and PR #31 (feat:
idempotent OpenClaw registry sync on `ocp update` + passive drift
self-check). No server.mjs changes in this PR.

Co-authored-by: Tao Deng <dtzp555@gmail.com>
Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "openclaw-claude-proxy",
-  "version": "3.10.0",
+  "version": "3.11.0",
   "description": "OCP (Open Claude Proxy) — use your Claude Pro/Max subscription as an OpenAI-compatible API for any IDE. Works with Cline, OpenCode, Aider, Continue.dev, OpenClaw, and more.",
   "type": "module",
   "bin": {