infra: add local redpanda broker

.env.sample

@@ -0,0 +1,22 @@
+# =========================
+# Kafka / Redpanda
+# =========================
+
+REDPANDA_VERSION=v26.2.3
+
+KAFKA_BOOTSTRAP_SERVERS=redpanda:9092
+
+# Raw CDR topic
+KAFKA_RAW_TOPIC=cdr.raw
+KAFKA_RAW_TOPIC_PARTITIONS=3
+KAFKA_RAW_TOPIC_REPLICATION_FACTOR=1
+KAFKA_RAW_TOPIC_RETENTION_MS=86400000
+KAFKA_RAW_TOPIC_COMPRESSION=lz4
+
+# Dead Letter Queue
+KAFKA_DLQ_TOPIC=cdr.raw.dlq
+KAFKA_DLQ_TOPIC_PARTITIONS=1
+KAFKA_DLQ_TOPIC_REPLICATION_FACTOR=1
+KAFKA_DLQ_TOPIC_RETENTION_MS=604800000
+
+KAFKA_CONSUMER_GROUP=cdr-processing-workers