Own the agent's Kafka account here

An account belongs to the consumer, not the broker: this repo says what the
agent may read, so adding or removing the agent adds or removes its access.
It was in infra-kafka, which deploys a cluster and should hold no opinion about
who uses it.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

deploy/kafka-account.yaml

@@ -0,0 +1,42 @@
+# This agent's Kafka account.
+#
+# It lives here rather than with the cluster because the account belongs to the
+# consumer, not to the broker: the agent's repo says what the agent may read,
+# and adding or removing the agent adds or removes its access. `infra-kafka`
+# deploys a cluster and holds no opinion about who uses it.
+#
+# The CR itself must be created in the operator's namespace — Strimzi runs with
+# `watchAnyNamespace=false`, so a KafkaUser anywhere else is simply ignored, with
+# no error anywhere.
+#
+# Read on one topic and one consumer-group prefix. It cannot see sales or
+# payments — an agent whose job is stock has no business reading who paid what —
+# and it cannot write, so a compromised workflow can raise no event that another
+# agent would then act on.
+apiVersion: kafka.strimzi.io/v1
+kind: KafkaUser
+metadata:
+  name: classic-models-agent-approvisionnement
+  namespace: kafka
+  labels:
+    strimzi.io/cluster: kafka
+spec:
+  authentication:
+    type: scram-sha-512
+  authorization:
+    type: simple
+    acls:
+      - resource:
+          type: topic
+          name: classic-models.catalog
+          patternType: literal
+        operations:
+          - Read
+          - Describe
+      - resource:
+          type: group
+          name: approvisionnement-
+          patternType: prefix
+        operations:
+          - Read
+          - Describe