feat: add rule dispatch, cross-plugin API, and Docker integration test

Wire rule registry and authenticated callbacks into both client and server
runtimes; expose __yonexusClient / __yonexusServer on globalThis for
cross-plugin communication. Add Docker-based integration test with
server-test-plugin (test_ping echo) and client-test-plugin (test_pong
receiver), plus docker-compose setup. Fix transport race condition where
a stale _connections entry caused promoteToAuthenticated to silently fail.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/docker/server/Dockerfile

@@ -0,0 +1,40 @@
+# Build context: repo root (Yonexus/)
+# ── Stage 1: compile ──────────────────────────────────────────────────────────
+FROM node:22-alpine AS builder
+
+WORKDIR /build
+
+# Server imports Yonexus.Protocol and Yonexus.Client/crypto — all needed for tsc
+COPY Yonexus.Protocol/src                    ./Yonexus.Protocol/src
+COPY Yonexus.Client/plugin/crypto            ./Yonexus.Client/plugin/crypto
+
+COPY Yonexus.Server/package.json             ./Yonexus.Server/
+COPY Yonexus.Server/package-lock.json        ./Yonexus.Server/
+COPY Yonexus.Server/tsconfig.json            ./Yonexus.Server/
+COPY Yonexus.Server/plugin                   ./Yonexus.Server/plugin
+
+WORKDIR /build/Yonexus.Server
+RUN npm ci
+RUN npm run build
+
+# ── Stage 2: runtime ─────────────────────────────────────────────────────────
+FROM node:22-alpine AS runtime
+
+RUN npm install -g openclaw@2026.4.9
+
+WORKDIR /app
+
+# Layout expected by install.mjs: repoRoot = /app, sourceDist = /app/dist
+COPY --from=builder /build/Yonexus.Server/dist         ./dist
+COPY --from=builder /build/Yonexus.Server/node_modules ./node_modules
+COPY Yonexus.Server/package.json               ./package.json
+COPY Yonexus.Server/plugin/openclaw.plugin.json ./plugin/openclaw.plugin.json
+COPY Yonexus.Server/scripts/install.mjs        ./scripts/install.mjs
+
+COPY tests/docker/server-test-plugin /app/server-test-plugin
+COPY tests/docker/server/entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+
+EXPOSE 8787
+
+ENTRYPOINT ["/entrypoint.sh"]