Add EXPORT_TO_KAFKA environment variable and update Ingestor class logic

- Introduced EXPORT_TO_KAFKA variable in values.yaml to control Kafka export behavior.
- Updated Ingestor class to parse and set the export_to_kafka attribute based on the environment variable.

values.yaml

@@ -130,6 +130,9 @@ env:
   # Application variables
   - name: KAFKA_SERVERS
     value: "kafka.kafka.svc.cluster.local:9092"
+  - name: EXPORT_TO_KAFKA
+    value: "false"
+
   - name: REDIS_HOST
     value: "redis-master.redis.svc.cluster.local"
   - name: REDIS_PORT