Run the load generators against our server: the window holds, memory returns to baseline, no defects

interop-tests/peers/dumbclient/Dockerfile

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+# smpp-dumb-client has no published image; built from source at a pinned commit. A second binary
+# is built from the same source with its own automatic enquire_link neutralised, for S6 - see
+# findings/07-load.md for why (every peer built for this phase sends enquire_link on its own
+# otherwise, and smppload, the one that never does, is blocked).
+FROM --platform=linux/amd64 golang:1.26.8-alpine3.23 AS builder
+
+RUN apk add --no-cache git ca-certificates
+
+ARG LIBSMPP_COMMIT=de0334bf2c1155fb3dd4f929674968254c932be6
+
+RUN git clone https://github.com/vponomarev/libsmpp.git /build \
+	&& cd /build \
+	&& git checkout "${LIBSMPP_COMMIT}"
+
+WORKDIR /build
+RUN go build -o /out/smpp-dumb-client ./app/smpp-dumb-client
+
+# libsmpp's enquireSender(60)/enquireSender(10) are the two call sites that start its unconditional,
+# unconfigurable 10s/60s enquire_link ticker (smpp.go) - both neutralised here for the no-ping build.
+RUN sed -i \
+		-e 's/go s\.enquireSender(60)/\/\/ patched for S6 (no enquire_link): &/' \
+		-e 's/go s\.enquireSender(10)/\/\/ patched for S6 (no enquire_link): &/' \
+		smpp.go \
+	&& go build -o /out/smpp-dumb-client-noping ./app/smpp-dumb-client
+
+FROM --platform=linux/amd64 alpine:3.23.5 AS runtime
+
+RUN apk add --no-cache netcat-openbsd
+
+WORKDIR /app
+COPY --from=builder /out/smpp-dumb-client /app/smpp-dumb-client
+COPY --from=builder /out/smpp-dumb-client-noping /app/smpp-dumb-client-noping
+COPY entrypoint.sh /app/entrypoint.sh
+COPY conf ./conf
+RUN chmod +x /app/entrypoint.sh /app/smpp-dumb-client /app/smpp-dumb-client-noping
+
+ENTRYPOINT ["/app/entrypoint.sh"]