Add the Approvisionnement consumer account

Read on one topic and one consumer-group prefix. It cannot see sales or
payments, and it cannot write, so a compromised workflow can raise no event
another agent would act on.

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

kafka-users.yaml

@@ -79,3 +79,37 @@ spec:
           - Write
           - Describe
 
+---
+# The Approvisionnement agent, which is woken by catalog events.
+#
+# Read on one topic and one consumer-group prefix, nothing else. 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