[rust + python] Add mq-bridge and mq-bridge-py

frameworks/mq-bridge-py/Dockerfile

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+# HttpArena image for the mq-bridge-py (Python) entry.
+#
+# Builds the mq_bridge_py wheel with maturin (http feature only) and runs
+# server.py on port 8080. Build and runtime share the same Python base image so
+# the compiled extension ABI matches. Pin MQB_REF to a released tag.
+FROM python:3.12-slim AS build
+
+ARG MQB_REF=v0.2.19
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends curl build-essential git ca-certificates \
+    && rm -rf /var/lib/apt/lists/*
+RUN curl https://sh.rustup.rs -sSf | sh -s -- -y --profile minimal
+ENV PATH="/root/.cargo/bin:${PATH}"
+RUN pip install --no-cache-dir maturin
+
+RUN git clone --depth 1 -b "${MQB_REF}" https://github.com/marcomq/mq-bridge /src
+WORKDIR /src/python/mq-bridge-py
+RUN maturin build --release --no-default-features -F http -F pyo3/extension-module -o /wheels
+
+FROM python:3.12-slim
+RUN groupadd --system appuser \
+    && useradd --system --gid appuser --create-home --home-dir /home/appuser --shell /usr/sbin/nologin appuser \
+    && mkdir -p /app /wheels \
+    && chown -R appuser:appuser /app /wheels
+COPY --from=build --chown=appuser:appuser /wheels/*.whl /wheels/
+# psycopg[binary] powers the optional /async-db profile; absent DATABASE_URL it is unused.
+RUN pip install --no-cache-dir /wheels/*.whl "psycopg[binary]>=3.1" "psycopg_pool>=3.2"
+WORKDIR /app
+COPY --chown=appuser:appuser server.py /app/server.py
+EXPOSE 8080
+# Take CPython's cyclic GC off the request hot path: the JSON handlers allocate
+# many short-lived dicts/lists per request (no reference cycles), so disabling
+# the periodic collector removes its scan overhead with no leak. `count` is the
+# safe alternative if a handler ever introduces cycles.
+ENV MQ_BRIDGE_PY_GC_MODE=off
+# Scale Python across cores with one process per core (single GIL each),
+# co-binding port 8080 via SO_REUSEPORT. Unset/0 => all cores; set 1 to disable.
+ENV MQB_WORKERS=0
+USER appuser:appuser
+CMD ["python", "server.py"]

frameworks/mq-bridge-py/meta.json

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+{
+  "display_name": "mq-bridge-py",
+  "language": "Python",
+  "type": "emerging",
+  "mode": "standard",
+  "engine": "mq-bridge",
+  "description": "mq-bridge Python bindings (mq_bridge_py). A single http->response route serves the cleartext HTTP/1.1 + h2c profiles; HTTP framing stays in Rust and the inline-response fast path keeps responses off the GIL, so the Python handler runs only the per-request dispatch.",
+  "repo": "https://github.com/marcomq/mq-bridge",
+  "enabled": true,
+  "tests": [
+    "baseline",
+    "pipelined",
+    "limited-conn",
+    "json",
+    "json-comp",
+    "upload",
+    "static",
+    "async-db",
+    "api-4",
+    "api-16"
+  ],
+  "maintainers": []
+}