feat: sync lijiaoqiao implementation and staging validation artifacts

platform-token-runtime/Dockerfile

@@ -0,0 +1,13 @@
+FROM golang:1.22-alpine AS builder
+WORKDIR /src
+
+COPY go.mod ./
+RUN go mod download
+COPY . .
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o /out/platform-token-runtime ./cmd/platform-token-runtime
+
+FROM gcr.io/distroless/static-debian12
+WORKDIR /app
+COPY --from=builder /out/platform-token-runtime /app/platform-token-runtime
+EXPOSE 18081
+ENTRYPOINT ["/app/platform-token-runtime"]