feat: add AI limits MQTT service

Dockerfile

@@ -0,0 +1,15 @@
+FROM golang:1.25-bookworm AS builder
+WORKDIR /src
+COPY go.mod go.sum* ./
+RUN go mod download
+COPY . .
+RUN /usr/local/go/bin/gofmt -w main.go && CGO_ENABLED=0 GOOS=linux /usr/local/go/bin/go build -trimpath -ldflags='-s -w' -o /out/ai-limits-mqtt .
+
+FROM node:24-bookworm-slim
+RUN apt-get update \
+  && apt-get install -y --no-install-recommends ca-certificates git ripgrep sqlite3 \
+  && rm -rf /var/lib/apt/lists/* \
+  && npm install -g @anthropic-ai/claude-code @openai/codex
+COPY --from=builder /out/ai-limits-mqtt /usr/local/bin/ai-limits-mqtt
+ENV NODE_ENV=production
+CMD ["/usr/local/bin/ai-limits-mqtt"]