Add RabbitMQ healthcheck

services/ingestion_dispatcher/Dockerfile

@@ -6,6 +6,6 @@ WORKDIR /app
 COPY requirements.txt ./
 RUN pip install --no-cache-dir -r requirements.txt
 
-COPY app.py ./
+COPY app.py healthcheck.py ./
 
 CMD ["python", "app.py"]

services/ingestion_dispatcher/healthcheck.py

@@ -0,0 +1,26 @@
+"""Simple healthcheck to verify RabbitMQ connectivity."""
+from __future__ import annotations
+
+import os
+import sys
+
+import pika
+
+
+def main() -> int:
+    rabbit_url = os.getenv("RABBITMQ_URL", "amqp://ingest:ingest@rabbitmq:5672/")
+    try:
+        connection = pika.BlockingConnection(pika.URLParameters(rabbit_url))
+        try:
+            channel = connection.channel()
+            channel.basic_qos(prefetch_count=1)
+        finally:
+            connection.close()
+    except Exception as exc:  # pragma: no cover - run-time diagnostic
+        print(f"[healthcheck] RabbitMQ unavailable: {exc}", file=sys.stderr)
+        return 1
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())