Update MinIO event routing for imagery bucket (image/sound separation)

[Tehila-Git]

Enhanced the MinIO configuration so that different prefixes in the imagery bucket trigger distinct Kafka topics:
Files uploaded to imagery/image now publish events to the image.new Kafka topic.
Files uploaded to imagery/sound now publish events to the sound.new Kafka topic.
This change improves event routing granularity and enables downstream consumers to process image and sound data independently.