Update Kafka Consumer to Support Avro Messages

[JohnnyAstrom]

Background

Kafka messages for “report created” are now sent using Avro instead of raw JSON. The current consumer (on another branch) still expects JSON and can’t read these messages.

Goal

Make the consumer able to read and handle Avro-serialized messages.

What needs to be done

• Update the consumer to use Avro deserialization
• Connect the consumer to the Schema Registry
• Remove JSON-specific parsing for report events

Done when

• The consumer can successfully read messages from the Avro-based producer
• No errors occur when processing “report created” events

Parent issue

• Kafka message schema optimization #68